Question

calcule o valor de x: a) 2x + 50 + 90 = 180 letra B) X + 60 + 90 é igual a 183 c) x + 10 + x - 20 + 90 = 180 d) 30 x + 90 = 180 e)2x+120 =180 f)x-30+2x+30=180 g)x+40=120 h)5x-60=3x+20

Answer 1

a) 2x + 50 + 90 = 180
    2x + 140 = 180
    2x = 180 - 140
    2x = 40
      x  = $\frac{40}{2}$
      x = 20



b) x + 60 + 90 = 183
    x + 150 = 183
     x = 183 - 150
     x = 33

c) x + 10 + x - 20 +90 = 180
    x + x + 100 - 20 = 180
    2x + 80  = 180
    2x = 180 - 80
    2x = 100
      x =  

Answer 2

a) 2x = 180-140
x = 40/2
x = 20

b) x = 183-150
x = 33

c) 2x = 180-80
x = 100/2
x = 50

d) 3x= 180-90
x = 90/3
x = 30

e) 2x = 180-120
x = 60/2
x = 30

f) x = 180/3
x = 60

g) x = 120/40
x = 3

h) 2x = 80
x = 80/2
x= 40