Question

Resolva as equação =
3*-7=2*+5=
7*+8=4*-10=
4*-15= -2*+3=
2*+5-5*= -1

Answer 1

a) 3x - 7 = 2x + 5
3x - 2x = + 5 + 7
x = + 12

b) 7x + 8 = 4x - 10
7x - 4x = - 10 - 8
3x = - 18
x = - 18/3
x = - 6

c) 4x - 15 = -2x + 3
4x + 2x = 3 + 15
6x = 18
x = 18/6
x = 3

d) 2x + 5 - 5x = -1
2x - 5x = -1 - 5
- 3x = - 6 (-1)
3x = 6
x = 6/3
x = 2