Multiply everything by 10 to get whole numbers
Solve equation [2] for the variable x
`2x = 16y - 36`
`x = 8y - 18`
Plug this in for variable x in equation [1]
`5(8y-18) + 32y = 90`
`72y = 180`
Solve equation [1] for the variable y
`72y = 180`
`y = 5/2`
By now we know this much :
`x = 8y-18`
`y = 5/2`
Use the y value to solve for x
`x = 8(5/2)-18 = 2`
The solution is `(2,5/2)`
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