Question

Solve for a: 2.2a + 3.4 b = 1.2a + 2.6

What is the value of a when b = 2? b =
1.5?

Answer 1

when b=2 , a = -4.2

when b=1.5 , b=-2.5

Explanation:

When b = 1.5

`2.2a + 3.4b = 1.2a + 2.6 \\ a = \\ b = 1.5 \\ 2.2a + 3.4(1.5) = 1.2a + 2.6 \\ 2.2a + 5.1 = 1.2a + 2.6`

`2.2a - 1.2a = 2.6 - 5.1 \\ a = - 2.5`

When b = 2

`2.2a + 3.4(2) = 1.2a + 2.6 \\ 2.2a + 6.8 = 1.2a + 2.6`

Collect like terms and simplify

`2.2a - 1.2a = 2.6 - 6.8 \\ a = - 4.2`