Resposta :
a) 5x + 40 = 60
5x = 20
x = 4
b) 30x = 120
x = 120/30
x = 4
5x = 20
x = 4
b) 30x = 120
x = 120/30
x = 4
a) 5 = 10
6 x+8
5.x+8=6.10
5x+40=60
5x=60-40
x=20/5
x=4
b) 2x = -24
5 15
15.2x=5.-24
30x=-120
x=-120/30
x=-4
Espero ter ajudado
6 x+8
5.x+8=6.10
5x+40=60
5x=60-40
x=20/5
x=4
b) 2x = -24
5 15
15.2x=5.-24
30x=-120
x=-120/30
x=-4
Espero ter ajudado