Question

resolva essas equações do 1 grau pra mim pfvr
5x - 6 = -3x + 18
10x + 27 = 4x - 21
20x - 12 = 10x + 78​

Answer 1

$5x - 6 = -3x + 18$

$5x + 3x - 6 = 18$

$5x + 3x = 18 + 6$

$8x = 18 + 6$$8x = 24$

$x = 3$

$10x + 27 = 4x - 21$

$10x - 4x + 27 = -21$

$10x - 4x = -21 - 27$

$6x = -21 -27$

$6x = -48$

$x = -8$

$20x - 12 = 10x + 78​$

$20x - 10x - 12 = 78$

$20x - 10x = 78 + 12$

$10x = 78 + 12$

$10x = 90$

$x = 9$