\(\left(4^2\right).x-\left(3^2\right).x=49\)
\(x\left(4^2-3^2\right)=49\)
\(x\left(16-9\right)=49\)
\(x.7=49\)
\(\Rightarrow x=49:7=7\)
là bàng x(4^2-3^2) =x (7)=49
suy ra x = 49:7 =7
Vậu x =7
hk tốt
Tìm x
4× (x+3)= 2 ×(x+1)+20
Help me please nhanh, đúng thì tick nha
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a)(1/2+1)x(1/3+1)x(1/4+1)x...x(1/999+1)
b)(1/2-1)x(1/3-1)x(1/4-1)x...x(1/1000-1)
c)3/22 x 8/32 x 15/42 x .... x 99/102
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Giúp mk vs mai nộp rồi
Ai làm đc mk tick cho okk help me, please
x-1/3=1/4*x
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1 + 2 + 3 + ..... + x = 150
please, help me!!!!!!!!
| -2/3 x + 0,4 | . 5/3 - 3/2= 1/6
help me please T o T
a) 3(-2x+1)-2020° = -2(2-x)-3.
Help me please
