Answer:
Step-by-step explanation:
theres 2 possible solutions for each equation and each one is right
or for dummies, just reverse the +/- inside the l x +/- y l. and make 2 different equations the first with a + and the second with a -
1. lb-6l = 1
b - 6 = 1
b = 7
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b + 6 = 1
b = -5
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2. lb+2l=7
b + 2 = 7
b = 5
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b - 2 = 7
b = 9
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