Question

porfavor ayudenme ;(

Answer 1

Explicación paso a paso:

7.

a.

$\frac{x}{2} + 10 = 20 \\ \frac{x}{2 } = 20 - 10 \\ \frac{x}{2} = 10 \\ x = 10 \times 2 \\ x = 20$

b.

$x - 40 = 50 \\ x = 50 + 40 \\ x = 90$

c.

$2x + 8 = 40 \\ 2x = 40 - 8 \\ 2x = 32 \\ x = \frac{32}{2} \\ x = 16$

d.

$\frac{5x}{2} - 6 = 55 \\ \frac{5x}{2} = 55 + 6 \\ \frac{5x}{2} = 61 \\ 5x = 61 \times 2 \\ 5x = 122 \\ x = \frac{122}{5} \\ x = 24.4$