Question 1155559
Solving:
5x - 3y = 18
-3x - 3y - -12
:
There is a lot simpler way to do this
-3x -3y = -12
simplify, divide -3
x + y = 4
y = -x+4
Using Substitution Method.
Replace y with (-x+4) in the first equation
5x - 3(-x+4) = 18
distribute the -3
5x + 3x - 12 = 18
8x = 18 + 12
8x = 30
x = {{{30/8}}}
x = 3.75
find y
y = -x + 4
y = -3.75 + 4
y = .25
:
Check solutions in the 1st equation
5x - 3y = 18
replace x & y
5(3.75) - 3(.25) = 18
18.75 - .75 = 18