Question

Determine as raízes das seguintes equações:
A- 17x -1 = 15x +3
B- 10y +4 = 16y -8
C- 9x -4 = 13x -27

Answer 1

17x - 1 = 15x + 3
17x - 15x = 3 + 1
2x = 4
x = 4/2
x = 2

10y + 4 = 16y - 8
10y - 16y = -8 - 4
- 6y = -12    (-1)
6y = 12
y = 12/6
x = 2

9x - 4 = 13x - 27
9x - 13x = -27 +4
-4x = -23  (-1)
4x = 23
x = 23/4

Answer 2

A- 17x-1=15x+3
17x-15x=3+1
2x=4
x=4/2
x=2

B- 10y+4=16y-8
10y-16y=-8-4
-6y=-12
y=-12/-6
y=2

C- 9x-4=13x-27
9x-13x=-27+4
-4x=-23
x=-23/-4