Question

Resolva as equações abaixo:

a)4x-7=8x-2
b)9x+9+3x=15
c)x+x-4=17-2x+1
d)x+2x+3-5x=4x-9
e)5x+6x-16=3x+2x-4
f)5x+4=3x-2x+4

Answer 1

Ok, vamos achar as soluções.

a)4x-7=8x-2
8x-4x = -2+7
4x = 5
x = 5/4 ✓

b)9x+9+3x=15
12x = 15-9
12x = 6
x = 6/12
x = 1/2 ✓

c)x+x-4=17-2x+1
2x-4 = -2x+18
2x+2x = 18+4
4x = 22
x = 11/2 ✓

d)x+2x+3-5x=4x-9
-2x-4x = -9-3
-6x = -12
x = 12/6
x = 2✓

e)5x+6x-16=3x+2x-4
11x-16 = 5x-4
11x-5x = -4 +16
6x = 12
x = 12/6
x = 2 ✓

f)5x+4=3x-2x+4
5x-x = 4 -4
4x = 0
x = 0 ✓