Question

Equações

A)10x -3 = -5x +27


B)6x -5 = 4x +15


C)7x -8 = -3x +12

Answer 1

$a) \: 10x - 3 = - 5x + 27 \\ 10x + 5x = 27 + 3 \\ 15x = 30 \\ x = \frac{30}{15} = 2$

$b) \: 6x - 5 = 4x + 15 \\ 6x - 4x = 15 + 5 \\ 2x = 20 \\ x = \frac{20}{2} = 10$

$c) \: 7x - 8 = - 3x + 12 \\ 7x + 3x = 12 + 8 \\ 10x = 20 \\ x = \frac{20}{10} = 2$

Answer 2

A)10x -3= -5x + 27
10x - 5x=27 + 3
5x=30
x=30 dividido por 5
x=6

B)6x -5 = 4x +15
6x - 4x = 15+5
2x=20
x=20 dividido por 2
x=2

C)7x -8 = -3x +127x+3x=12+8
10x=20
x=20 dividido pora 10
x=2