Question

Monte as equações abaixo:

a) 3x - 1 = 5

b) 4(x - 1)= 6 - x

c) 2y + 5 = y - 1

d)7 (x + 3) = 56

e)5x - 8 = 7

f) -2 -2x = 7 - 5x

Answer 1

a) 3x = 5 + 1
3x = 6
x = 2

b) 4(x-1) = 6 - x
4x - 4 + x = 6
5x = 6 + 4
5x = 10
x = 2

c) 2y + 5 = y - 1
2y - y = -1 -5
y = -6

d) 7 (x+3) = 56
7x +21 = 56
7x = 56 - 21
7x = 35
x = 5

e) 5x - 8 = 7
5x = 7 + 8
5x = 15
x = 3

f) -2 -2x = 7 - 5x
5x - 2x = 7 + 2
3x = 9
x = 3