x x 2 + x x 3 = 4 x x 9 - 1,5 = 30
tìm x
x*2+x*3=4
x*9-1,5=30
`x xx2+x xx3=4`
`x xx(2+3)=4`
`x xx5=4`
`x=4:5=4/5`
_______________________
`x xx9-1,5=30`
`x xx9=30+1,5`
`x xx 9=31,5`
`x=31,5:9`
`x=3,5`
\(x\times2+x\times3=4\)
\(x\times\left(2+3\right)=4\)
\(x\times5=4\)
\(x=4:5\)
\(x=\dfrac{4}{5}\)
\(x\times9-1,5=30\)
\(x\times9=30+1,5\)
\(x\times9=31,5\)
\(x=31,5:9\)
\(x=3,5\)
a,X x 2 + X x 3=4
X x(2+3) =4
X x 5 =4
X 4/5
b, 9xX-1,5=30
9xX =30+1,5=31,5
X = 31,5:9
X =3,5
a)x*2+x*3=4 b)x*9-1,5=30
các bạn giúp mình với,mình cần gấp
a) x*2+x*3=4
x*(2+3)=4
x*5=4
x=4:5
x=4/5(0,8)
Vậy x = 4/5 (0,8)
b)x*9-1,5=30
x*9 = 30+1,5
x*9 = 31,5
x = 31,5 : 9
x = 3,5
Vậy x = 3,5
a) X x 2 + X x 3 = 4 b) X x 9 - 1,5 = 30
X x ( 2 + 3 ) = 4 X x 9 = 30 + 1,5
X x 5 = 4 X x 9 = 31,5
X = 4 : 5 X = 31,5 : 9
X = 0,8 X = 3,5
~ Hok T ~
tìm x
a, x * 2 + x * 3 = 4
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b, x * 9 - 1,5 = 30
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a,\(x.2+x.3=4\\\) b,\(x.9-1,5=30\)
\(x\left(2+3\right)=4\) \(x.9=30+1,5=31,5\)
\(x=31,5:9=3,5\)
\(x.5=4=>x=4:5=\frac{4}{5}\)
a, x * 2 + x * 3 = 4
x * ( 2 + 3 ) = 4
x * 5 = 4
x = 4 : 5
x = 4/5
b, x * 9 - 1,5 = 30
x * 9 = 30 + 1,5
x * 9 = 31,5
x = 31,5 : 9
x = 3,5
a, x * 2 + x * 3 = 4
x * ( 2 + 3 ) = 4
x * 5 = 4
x = 4:5
x = \(\frac{4}{5}\)
b, x* 9 - 1,5 = 30
x* 9 = 30 + 1,5
x* 9 = 31,5
x = 31,5 : 9
x = \(\frac{7}{2}\)
tính nhanh (30 : 7,5 + 0,5 x 3 - 1,5) x (4,5 -9 : 2)
( 4,5 x 16 -1,7) : ( 4,5 x 15 +2,8)
(30 : 7,5 + 0,5 x 3 - 1,5) x (4,5 - 9 : 2)
= (30 : 7,5 + 0,5 x 3 - 1,5) x (4,5 - 4,5)
= (30 : 7,5 + 0,5 x 3 - 1,5) x 0
= 0
câu trên chuẩn
(4,5*16-1,7):4.5*15+2.8
=\(\frac{4,5\cdot16-1.7}{4,5\cdot15+2,8}\)
=\(\frac{4,5\cdot\left(15+1\right)-1.7}{4,5\cdot15+2,8}\)
=\(\frac{4,5\cdot15+4,5-1,7}{4,5\cdot15+2.8}\)
=\(\frac{4,5\cdot15+2,8}{4,5\cdot15+2,8}\)
=1
Tìm x
X×2+x×3=4 x×9-1,5=30
x . 2 + x . 3 = 4
x . ( 2+3 ) = 4
x. 5 = 4
x = 4: 5 = 0,8
x . 9 - 1,5 = 30
x . 9 = 30 + 1.5 = 31.5
x = 31.5 : 9 = 3.5
a) (x-1)(x+5)/3-(x+2)(x+5)/12=(x-1)(x+2)/4
b, 2(x-4)/3+4(x+30-x+1/8=3(2x-3)-7/5
c, x-10-7x/6+1=x/2+3(x-1)+2-x/9
d, 0,6(x+10)+0,4(11x-5)=0,7x+25,5
e, 5x-1/3+7x-1,1/3-1,5-5x/7=9x-0,7/4
g, x-4/5+3x-2/10=2x-5/3-x+2/6
30% x \(x\) + 1,5 x \(x\)=9
cứu mik
=>3/10x+3/2x=9
=>9/5x=9
hay x=5
6. 27/35 x 5/9 - 2/7 x -7/5
7. 10/13 x 13/5 + {-9/5} x 10/3
8. 100/27 x 9/20 + 40% x 5/3
9. 1,5 x 5/12 + 1/4 x 3/4
9: =3/2*5/12+3/16
=15/24+3/16
=5/8+3/16
=13/16
Tìm x biết:
a) x + 30% x+1,5 x = 2,5
b) 2 (3x - 4) - 3 (x + 2) = 3
c) -110 + 7x - 80 = 25 + 2x - 80
a, \(x+30\%x+1,5x=2,5\\ < =>x+0,3x+1,5x=2,5\\ < =>\left(1+0,3+1,5\right)x=2,5\\ < =>2,5x=2,5\\ =>x=\dfrac{2,5}{2,5}=1\)
b, \(2\left(3x-4\right)-3\left(x+2\right)=3\\ < =>6x-8-3x-6=3\\ < =>6x-3x=3+8+6\\ < =>3x=17\\ =>x=\dfrac{17}{3}\)
c, \(-110+7x-80=25+2x-80\\ < =>-110-80+80-25=2x-7x\\ < =>-135=-5x\\ =>x=\dfrac{-135}{-5}=27\)