Question

Ecuaciones otra vez...

~ 5x + 7 - 11x + 3 = x - 25
~ -7x + 1 + 3x - 12 = 7 + 2x
~ -8 -5x + 3 + 8x = 1 - x +10

Answer 1

• 5x + 7 - 11x + 3 = x - 25
5x - 11x - x = -25 -7 -3
-7x = -35
x = -35/-7
x = 5

Comprobación
5(5) + 7 - 11(5) + 3 = 5 -25
25 + 7 -55 +3 = -20
-20 = -20

• -7x + 1 + 3x - 12 = 7 + 2x
-7x + 3x - 2x = 7 - 1 + 12
-6x = 18
x = 18/-6
x = -3

Comprobación
-7(-3) + 1 + 3(-3) -12 = 7 + 2(-3)
21 + 1 - 9 - 12 = 7 - 6
1 = 1

• -8 -5x + 3 + 8x = 1 - x + 10
-5x + 8x + x = 1 + 10 + 8 - 3
4x = 16
x = 16/4
x = 4

Comprobación
-8 - 5(4) + 3 + 8(4) = 1 - 4 + 10
-8 -20 + 3 + 32 = 7
7 = 7