Mathematics
Solve the following pairs of linear equations:
Linear Equations
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Answer
Substituting in above equations we get,
……(i)
5a - 3b = 1 …….(ii)
Solving eq (i) we get,
Multiplying eq. (ii) by 4 we get,
20a - 12b = 4 …….(iv)
Multiplying eq. (iii) by 3 we get,
27a + 12b = 90 …….(v)
Adding eq. (iv) and (v) we get,
⇒ 20a - 12b + 27a + 12b = 4 + 90
⇒ 47a = 94
⇒ a = 2.
Substituting value of a in eq. (ii) we get,
⇒ 5(2) - 3b = 1
⇒ 10 - 3b = 1
⇒ 3b = 10 - 1
⇒ 3b = 9
⇒ b = 3.
Hence,
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