Question

Find the solution of the following questions.
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Answer 1

Answer:

the answers are a) 7

b) -8

c) 4

d) 9

e) 2.2

Step-by-step explanation:

a)

$\frac{6x}{7} - 2 = 4 \\ \frac{6x}{7} = 4 + 2 \\ \frac{6x}{7} = 6 \\ 6x = 7 \times 6 \\ 6x = 42 \\ x = 7$

b)

$- 49 = 7(x + 1) \\ - 49 = 7x + 7 \\ - 49 - 7 = 7x \\ - 56 = 7x \\ - \frac{56}{7} = x \\ - 8 = x \\ x = - 8$

c)

$- 7 + 7(x - 3) = 0 \\ - 7 + 7x - 21 = 0 \\ 7x - 28 = 0 \\ 7x = 28 \\ x = \frac{28}{7} = 4$

d)

$8(x - 4) + 2 = 42 \\ 8x - 32 + 2 = 42 \\ 8x - 30 = 42 \\ 8x = 42 + 30 \\ 8x = 72 \\ x = \frac{72}{8} = 9$

e)

$\frac{5x + 7}{9} = 2 \\ 5x + 7 = 9 \times 2 \\ 5x + 7 = 18 \\ 5x = 18 - 7 \\ 5x = 11 \\ x = \frac{11}{5} = 2.2$