Question

$5z + 1 \div 3 = 7 \: \\ find \: the \: value \: of \: z$
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Answer 1

$\huge \color{yellow}{ola}$

$5z + 1 \div 3 = 7$

$or$

$5z + \frac{1}{3} = 7$

$5z = 7 - \frac{1}{3}$

$5z = \frac{20}{3}$

$z = \frac{20}{3 \times 5}$

$z = \frac{4}{3}$

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Answer 2

Answer : z = 4

How to find?

→ To find z , we shall used transposition method simply.

Steps:

$5z + 1 \div 3 = 7 \\ \implies 5z + 1 = 7 \times 3 \\ \implies 5z = 21- 1 \\ \implies z = \frac{20}{5} \\ \implies z = 4$

.°. z = 4

Let's check it too :

LHS:

5z+1÷3

→ 5×4+1÷3

→ 20+1÷3

→ 21÷3

→ 7

→RHS

.°. LHS = RHS

Hence, z=4 is the correct answer.

So, done!