Chapter 0.5, Problem 24E

To determine

To solve the equation $3n+7=28$

Answer to Problem 24E

  $n=7$

Explanation of Solution

Given Information: $3n+7=28$

Formula Used : Linear equations with one variable

Calculation:

Given equation is

  $3n+7=28$

To isolate the variable n, subtracting 7 both sides-

  $3n+7-7=28-7$

This gives-

  $3n=21$

To isolate the variable c, divide by 3 both side-

  $\frac{3}{3}n=\frac{21}{3}$

To simplify further, writing 21 as its factors-

  $\frac{3}{3}n=\frac{3\times 7}{3}$

Hence the final answer is-

  $n=7$