SOLUTION: How do you solve by the addition-or-subtraction method.
12a-5b=18
15a-5b=30
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Question 173665: How do you solve by the addition-or-subtraction method.
12a-5b=18
15a-5b=30
Answer by jojo14344(1513) (Show Source): You can put this solution on YOUR website!
---->, EQN 1
---->, EQN 2
Subtract EQN 1 to EQN 2:
where-----> --> see EQN 2, change "signs" when subtacting right?
Continuing the "highlighted" eqn:
----->
Go back EQN 1:
--->--->
Check go back EQN 2:
Thank you,
Jojo
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