Question

Solve and check your answer by substitution i) ( 3 a -7) ÷ 4 = -4 ​

Answer 1

Answer:

To solve 2x + 3 = 9 - x, we must first isolate x to one side of the equation. The easiest way to do this is to add x to each side:

2x + 3 = 9 - x

x +...

Answer 2

Answer:x = -53/3

Step-by-step explanation:

x/3 + 6 = 1/9

(x + 18) / 3 = 1/9                                 ( Cross multiplication)

x + 18 = 1/9 * 3

x + 18 = 3/9

x + 18 = 1/3

x = 1/3 - 18

x = (1-54)/3 = -53 / 3                        (Cross multiplication)

Checking

x = -53/3

x/3 + 6 = 1/9

(-53/3)/3 + 6 = 1/9

(-53/3) * 1/3 + 6 = 1/9

-53/9 + 6 = 1/9

(-53+54)/9 = 1/9                                (Cross multiplication)

1/9 = 1/9

Hence, x = -53/3

Hope it helps... : )