Question

resolva as seguintes esquações de 1° grau:

a) 4x+10=3x-5
b)7x-2x-12=3x+20
c)3(x+2)+11=2(x-4)+15

Answer 1

a) 4x+10=3x-5
4x-3x= -5-10
x=-15

b)7x-2x-12=3x+20
5x -3x= 20+12
2x= 32
x=32/2 = 16

c)3(x+2)+11=2(x-4)+15
3x+6+11=2x-8+15
3x+17=2x+7
3x-2x=7-17
x=-10