Is a= -2 a solution to 7= a -9

asked Dec 6, 2019 60.2k views

4 votes

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6 votes

Substitute a=-2 into 7=a-9 and will get 7=-2-9 so 7=-11 so since this is not true
a=-2 in NOT a solution for 7=a-9

SnowmanXL answered Dec 9, 2019

7.1k points

6 votes

add 9 to both sides

$7 + 9 = a - 9 + 9 \\ 7 + 9 = a \\ 16 = a \\ a = 16$

MYJ World answered Dec 10, 2019

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