Question #15fe4

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Answer 1 · 2017-09-19T21:37:38

$n = 6$ $n = 6$

Step one: collect like-terms

$7 n + 3 = 45$ $7n+3=45$

7n + (2+1) = 45

Step two: : subtract both sides by 3

$7 n = 42$ $7n = 42$

7n + 3 -3 = 45 -3
7n = 42**

Step three : divide both sides by 7

Ans is $n = 6$ $n = 6$

Answer 2 · 2017-09-19T21:41:43

$n = 6$ $n = 6$

Combine like terms:
$7 n + (2 + 1) = 45$ $7n + (2+1) = 45$
$7 n + 3 = 45$ $7n + 3 = 45$

Isolate the variable:
$7 n + 3 - 3 = 45 - 3$ $7n + 3 -3 = 45 -3$
$7 n = 42$ $7n = 42$
$\frac{7 n}{7} = \frac{42}{7}$ $(7n)/7 = 42/7$

$n = 6$ $n = 6$