Question

2_ Determine o valor de X:
a) 2X + 7X-30 + 5X = 180

b) 3X-10 = X+50

Answer 1

a) 14x = 180 - 30
14x = 150
x = 150:14
x = 10,714285

b) 2x = 60
x= 60:2
x:30

Answer 2

Resposta:

a) 2x+7x-30+5x=180

2x+7x+5x=180+30

14x=210

x=210/14

x=15

b)3x-10=x-50

3x-x=50+10

2x=60

x=60/2

x= 30