Question

resolva as expressões pff a)x+x+10=130
b) 3x+2x-30=90​

Answer 1

Resposta:

a)

x+x+10=130

2x=130-10

2x=120

x=120/2

x=60

b)

3x+2x-30=90

5x=90+30

5x=120

x=120/5

x=24