7 x + 8 = 4x - 10
7x - 4x = -10 - 8
3x = -18 (-1)
x = [tex] \frac{18}{3} [/tex]
x = 6
4x - 15 = -2x +13
4x + 2x = 13 + 15
6x = 28
x = [tex] \frac{28}{6} [/tex]
7 (x-5) = 3 (x+1)
7 - 5x = 3 + 1x
-5x - 1x = 3 - 7
-6x = -4 (-1)
x = [tex] \frac{4}{6} [/tex]
3 (x-2) = 4 (-x +3)
3 - 2x = 4 -3x
-2x +3x = 4 - 3
x = 1
5 (2x - 4) = 7 (x+1) -3
5 - 2x = 7 +1x -3
-2x - 1x = 7 - 3 -5
x = -1
Espero ter ajudado, beijos!
