Question

1. 5 (x -2 ) = 4 - (-2x -1)

2. 3+(x -4) = 3 (x -4)

3. 1/2 - 2 (x - 2) = 1 - x + 1
3 6

Answer 1

Resposta:

$5\left(x-2\right)=4-\left(-2x-1\right)\\5x-10=2x+5\\5x-10+10=2x+5+10\\5x=2x+15\\3x=15\\x=5$

$3+\left(x-4\right)=3\left(x-4\right)\\3+x-4=3\left(x-4\right)\\x-1=3\left(x-4\right)\\x=3x-11\\-2x=-11\\x=\frac{11}{2}$

$\frac{1}{2}-2\left(x-2\right)=1-x+1\\\frac{1}{2}-2\left(x-2\right)=-x+2\\-2x+\frac{9}{2}=-x+2\\-2x=-x-\frac{5}{2}\\-x=-\frac{5}{2}\\x=\frac{5}{2}$