$\"\"$ $\"\"$

The expression is $\"\"$ .

According to subtraction property of equality: if $\"\"$ , then $\"\"$ .

$\"\"$ (Subtract 7 from each side)

$\"\"$ (Additive inverse property: $\"\"$ )

y = 14 (Subtract: $\"\"$ ) $\"\"$

Check:

To check the solution Substitute the value of y = 14 in above expression.

$\"\"$

21 = 21 (Add: $\"\"$ ) $\"\"$

The value of y = 14

By the number line y = 14

$\"number$