Question

3x + x = 16 + 12
15 + x = 30 + 5
3x + 5 = -2x + 10
x + x = 12 + 8
50 + x= 55​

Answer 1

Explicación paso a paso:

a)

$3x + x = 16 + 12$

$4x = 28$

$x = 28 \div 4$

$x = 7$

b)

$15 + x = 30 + 5$

$15 + x = 35$

$x = 35 - 15$

$x = 20$

c)

$3x + 5 = - 2x + 10$

$3x + 2x = 10 - 5$

$5x = 5$

$x = 5 \div 5$

$x = 1$

d)

$x + x = 12 + 8$

$2x = 20$

$x = 20 \div 2$

$x = 10$

e)

$50 + x = 55$

$x = 55 - 50$

$x = 5$