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please help???

12a-5b=18
15a-5b=30

2007-08-30 07:20:40 · 1 answers · asked by pinkparadiseforever 2 in Science & Mathematics ➔ Physics

1 answers

Subtract the first equation from the second to get
3a=12
a=4
then plug a into each to solve for b and check
(12*4-18)/5=b
b=6
(15*4-30)/5=b
b=6

j

2007-08-30 07:31:39 · answer #1 · answered by odu83 7 · 0⤊ 0⤋

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