Tìm x
7.(x-9)-5(6-x)=-6+11x
B1:tìm x bt a)7×(x-9)-5×(6-x)=-6+11x
`#040911`
`a)`
\(7.(x-9)-5.(6-x)=-6+11x\)
`<=> 7x - 63 - 30 + 5x = 11x - 6`
`<=> 7x + 5x - 11x = 63 + 30 - 6`
`<=> (7 + 5 - 11)x = 87`
`<=> x = 87`
Vậy, `x = 87.`
=>7x-63-30+5x=11x-6
=>12x-93=11x-6
=>x=-6+93=87
7(x-3)-5(3-x)=11x-5
7(x-9)-5(6-x)=-6+11x
7(x-3)-5(3-x)=11x-5
<=>7(x-3)+5(x-3)-11x+5=0
<=>12(x-3)-11x+5=0
<=>12x-36-11x+5=0
<=>x-31=0
<=>x=31
7(x-9)-5(6-x)=-6+11x
7(x-3)-5(3-x)=11x-5
a, => 7x-63-30+5x=11x-6
=> 12x-93=11x-6
=> 12x=11x-6+93 = 11x+87
=> 12x-11x=87
=> x=87
b, => 7x-21-15+5x=11x-5
=> 12x-36=11x-5
=> 12x=11x-5+36 = 11x+31
=> 12x-11x=31
=> x=31
Tk mk nha
-5(2-x)+4(x-3) =10x + 15 (tìm x)
7(x-9)-5(6-x)=-6+11x
xy+14+2y+7x=-10 (tìm xy)
\(-5.\left(2-x\right)+4\left(x-3\right)=10x+15\)
\(-10+5x+4x-12=10x+15\)
\(9x-22=10x+15\)
\(10x-9x=-22-15\)
\(x=-37\)
\(7.\left(x-9\right)-5\left(6-x\right)=-6+11x\)
\(7x-63-30+5x=-6+11x\)
\(12x-93=-6+11x\)
\(12x-11x=-6+93\)
\(x=87\)
\(xy+14+2y+7x=-10\)
\(\left(xy+2y\right)+\left(14+7x\right)=-10\)
\(y\left(x+2\right)+7\left(2+x\right)=-10\)
\(\left(x+2\right)\left(y+7\right)=-10\)
Câu cuối mk chỉ biết làm đến đó thôi
bn tự làm nha
a) -12+(x-9)<0 tìm x thuộc Z
b)x-(13-x)=-24+(-7+x)
c) (x - 7)+( 5-x)=12-(-8+x)
d)5(x-6)-2(x+3)=12
e)3(x-4)-(8-x)=12
f) 7(x-3)-5(3-x)=11x-5
g) 7(x-9)-5(6-x)=-6+11x
a) -12+(x-9)<0 tìm x thuộc Z
b)x-(13-x)=-24+(-7+x)
c) (x - 7)+( 5-x)=12-(-8+x)
d)5(x-6)-2(x+3)=12
e)3(x-4)-(8-x)=12
f) 7(x-3)-5(3-x)=11x-5
g) 7(x-9)-5(6-x)=-6+11x
-3(x-5)+6(x+2)=9
7(x-9)-5(6-x)=-6+11x
10(x-7)-8(x+5)=6(-5)+24
a) -3.(x-5) + 6.(x+2) = 9
-3x + 15 + 6x + 12 = 9
3x + 27 = 9
3x = -18
x = -6
b) 7.(x-9) - 5.(6-x) = -6 + 11.x
7x - 63 - 30 + 5x = - 6 + 11.x
=> 12x - 11x = - 6 + 63 + 30
x = 87
c) 10.(x-7) - 8.(x+5) = 6.(-5) + 24
10x - 70 -8x - 40 = -6
2x - 110 = - 6
2x = 104
x = 52
\(-3\left(x-5\right)+6\left(x+2\right)=9\)
\(\Rightarrow-3x+15+6x+12=9\)
\(\Rightarrow-3x+6x=9-15-12\)
\(\Rightarrow3x=-18\)\(\Rightarrow x=-6\)
\(7\left(x-9\right)-5\left(6-x\right)=-6+11x\)
\(\Rightarrow7x-63-30+5x=-6+11x\)
\(\Rightarrow7x+5x-11x=-6+63+30\)
\(\Rightarrow x=-6+63+30=87\)
7 (x - 9) -5 (6 - x) = -6 + 11x
\(7\left(x-9\right)-5\left(6-x\right)=-6+11x\\ \Rightarrow7x-63-30+5x+6-11x=0\\ \Rightarrow x-87=0\\ \Rightarrow x=87\)
\(7x-63-30+5x+6-11x=0\\ x-87=0\\ x=87\)
7(x-9)-5(6-x)=-6+11x
10(x-7)-8(x+5)=6(-5)+24
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