Question

Por favor me ajudem eu preciso disso pra AMANHÃ

Answer 1

a)

2x+x-15=90

3x=90+15

x=105/3

x=35

(2x=70)(x-15=20)

b)

5x-30+2x=180

7x=180+30

x=210/7

x=30

(5x-30=120)(2x=60

c)

x+20+3x-40=180

4x-20=180

4x=180+20

x=200/4

x=50

(x+20=70)(3x-40=110)