a+3b=5 and 7a-8b=6.Solve by substitution Method.

a+3b=5 and 7a-8b=6.Solve by substitution Method. [ICSE Class 9 ML Aggarwal Chapter 5 Exercise 5.1 Simultaneous Linear Equation Question 2(i) Solution]

a+3b=5 —(i)

7a-8b=6 —-(ii)

From Equation (i) we get,

a=5-3b —(iii)

Substituting the value of a in equation (ii) we get,

7(5-3b)-8b=6

⟹ 35 -21b-8b=6

⟹ -29b=6-35

⟹ -29b=-29

⟹ b = 29/29

⟹ b = 1

From equation (iii) we get,

a=5-3(1)=5-3=2

∴ Required Solutions are a=2 and b=1

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