Question

А

Answer 1

Answer:

$x = 4$

Step-by-step explanation:

$AD = BC$

$8x - 12 = 20$

$8x = 20 + 12$

$8x = 32$

$\frac{8x}{8} = \frac{32}{8}$

$x = 4$

to be sure

$8x - 12 { = }^{?} 20$

$8 \times 4 - 12 { = }^{?} 20$

$32 - 12 { = }^{?} 20$

$20 = 20$