Question

3x + 54 =12
5x + 3y = 4​

Answer 1

$3x + 54 = 12 \\ 3x = 12 - 54 \\ 3x = - 42 \\ x = \frac{ - 42}{3} \\ x = - 14 \\ \\ 5x + 3y = 4 \\ 5 \times - 14 + 3y = 4 \\ - 70 + 3y = 4 \\ 3y = 4 + 70 \\ 3y = 74 \\ y = \frac{74}{3}$

Answer 2

Answer:

1) 3x + 54 = 12

3x = 12 - 54

3x = -42

x = -42/3

x = -14