solve : 3a+5b=9; 2a+5b = -11 substraction equation
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20 is the answer and b=-51/5.Please mark it as BRAINLIEST
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3a + 5b = 9............1
2a + 5b = -11.........2
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a = 20
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subs a in eqn 1
3(20) + 5b = 9
5b = 9 - 60
5b = -51
b = - 51/5
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