Question

༆solve simultaneous equation
a+2b=5
3a+b=5​

Answer 1

a+2b=5

1. 2+4 ≠5
2. 2+2≠5
3. 1+4=5
4. 1+3≠5
5. -2+2≠5

3a+b=5

1. 6+2≠5
2. 6+1≠5
3. 3+2=5
4. 3+1≠5
5. -6+1≠5

Answer 2

Answer :-

→ a + 2b = 5 -i

→ 3a + b = 5 -ii

Multiplying equation ii by 2 :-

→ 2 ( 3a + b = 5 )

→ 6a + 2b = 10 -iii

Subtracting equation i from equation iii :-

→ 6a + 2b - a - 2b = 10 - 5

→ 6a - a + 2b - 2b = 5

→ 5a = 5

→ a = 5 / 5

→ a = 1

Substituting the value in equation i :-

→ a + 2b = 5

→ 1 + 2b = 5

→ 2b = 5 - 1

→ 2b = 4

→ b = 4 / 2

→ b = 2

Value of a = 1 and b = 2