Question

1) resolva as equações

a) 4x+5=17
b) 2x-45=65
c) 3a+12=a-6
d) 3.(x+5)=2x-40

Answer 1

a) 4x+5=17
4x = 12
x= 12/4 = 3


b) 2x-45=65
2x = 65 + 45
2x = 110
x = 55

c) 3a+12=a-6

3a - a = -12 - 6
2a - -18
a = -9

d) 3.(x+5)=2x-40
3x + 15 = 2x - 40
3x - 2x = -40 - 15
x = -55