Question

4x+4y=120
6x + 2y=148​

Answer 1

Explicación paso a paso:

$4x + 4y = 120 \\ 6x + 2y = 148 \: \: \: \times - 2 \\ - 12x - 4y = - 296 \\ 4x + 4y = 120 \\ - 8x = 176 \\ 8x = - 176 \\ x = \frac{ - 176}{8} = 22$

$4 \times 22 + 4y = 120 \\ 88 + 4y = 120 \\ 4y = 120 - 88 \\ 4y = 32 \\ y = \frac{32}{4} = 8$

$4 \times 22 + 4 \times 8 = 120 \\ 6 \times 22 + 2 \times 8 = 148$