Question

Resolva as seguintes equações:
a) 900-400-18X=32X-500

b)10+X=X+X

c)150-23=3X+1

d)68=2X-12+36

Answer 1

a) 900-400-18x = 32x-500
500-18x = 32x-500
500+500 = 32x + 18x
1000 = 50x
x = 1000/50
x = 100/5
x = 20

b) 10+x = x+x
10+x = 2x
10 = 2x-x
10 = x

c) 150-23 = 3x+1
127-1 = 3x
126 = 3x
x = 126/3
x = 42

d) 68 = 2x-12+36
68-24 = 2x
44 = 2x
x = 44/2
x = 22