Question

determine a solucao da equacao 4x+y=20, quando: x= -3/4

Answer 1

4x + y  = 20, sendo x = -3/4
4.(-3/4) + y = 20
-12/4 + y = 20
-12/4 + 4y/4 = 80/4
-12 + 4y = 80
4y = 80+ 12
4y = 92
y = 92/4
y = 23

Answer 2

Resolução:
$4x+y=20$

$\frac{4.(-3)}{4} +y=20$

$-3+y=20$

$y=20+3$

$y=23$

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