Question

How do you solve the system of equations: 4y=5x-1 and 3x-2y=1?

Answer 1

x = 1 ; y = 1

Explanation:

Re-write the equations as
4y - 5y + 1 = 0 -----------(1)
- 2y + 3x - 1 = 0 ----------(2)

Let us multiply equation (2) with 2 then

• 2y + 3x - 1 = 0 ----------(2) `xx` 2
• 4y + 6x - 2 = 0 -------(3)

Take equations (1) and (3). Add (1) and (3)

4y - 5y + 1 = 0 -----------(1)
- 4y + 6x - 2 = 0 -------(3)

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    x -1 = 0
        x = 1

Substitute (x = 1 ) in
4y = 5x - 1
4y = 5(1) -1 = 5 - 1 = 4
y = `4/4` = 1
y = 1