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liraira [26]
3 years ago
9

Solve the simultaneous equations: 3a-2b=14 12a+9b=39

Mathematics
1 answer:
kirill [66]3 years ago
5 0
Use elimination
Multiply first equation by 4
12a - 8b = 56
12a + 9b = 39
Subtract both
-17b = 17
b = -1
Plug in -1 for b
3a - 2(-1) = 14
3a = 12, a = 4
Final answer: a = 4, b = -1
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