Question

x+5=9
x-4=5
5z=-30
4y+16=4
4x-2=x+10
4.(x+3)=2.(12-x)

Answer 1

Explicação:

$x+5=9\\x = 9 - 5\\x = 4$

$x-4=5\\x = 5 + 4 \\x = 9$

$4y+16=4\\4y = 4-16\\4y = -12\\y = \frac{-12}{4} \\y = -3$

$4x-2=x+10\\4x -x = 10 + 2 \\3x = 12\\x = \frac{12}{3} \\x = 4$

$4.(x+3)=2.(12-x)\\4x + 12 = 24 - 2x\\4x + 2x = 24 - 12\\6x = 12\\x = \frac{12}{6} \\x = 2$