Question

6 (5 - 2x) = 18 =?
3 (9 - x) = 15 =?
4 (7 -x) = 20 =?

Answer 1

Respuesta:

Explicación paso a paso:

PROBLEMA 1

6 (5 - 2x) = 18 =

30 - 12X = 18

12X = 30-18

12X = 12

X= 1

PROBLEMA 2

3 (9 - x) = 15 =

27-3X = 15

27-15 = 3X

12 = 3X

4 = X

PROBLEMA 3

4(7-X) = 20

28 - 4X = 20

28 -20 = 4X

8 = 4X

2 = X

Answer 2

$6(5 - 2x) = 18 \\ 30 - 12x = 18 \\ 30 = 18 + 12x \\ 30 - 18 = 12x \\ 12 = 12x \\ \frac{12}{12} = x \\ x = 1$

$3(9 - x) = 15 \\ 27 - 3x = 15 \\ 27 = 15 + 3x \\ 27 - 15 = 3x \\ 12 = 3x \\ \frac{12}{3} = x \\ x = 4$

$4(7 - x) = 20 \\ 28 - 4x = 20 \\ 28 = 20 + 4x \\ 28 - 20 = 4x \\ 8 = 4x \\ \frac{8}{4} = x \\ x = 2$