Question

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Answer 1

12

8+8 = 16
X+4 + X+4 = 2X + 8

16+8 = 24
2X = 24
24/2 = 12

Answer 2

Resposta:

14cm

Explicação passo-a-passo:

$a = b \times h \\ 112 = (x + 4) \times 8 \\ 112 = 8x + 32 \\ 112 - 32 = 8x \\ 80 = 8x \\ \frac{80}{8} = x \\ 10 = x$

$c = x + 4 \\ c = 10 + 4 \\ c = 14cm$