how do i solve this question?
systems of equations are very confusing
Stacey Warren - Expert brainly.com
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it says i have to find the solution by using elimination by addition
Solve for one variable and stick it into the equation.
Let go with and solve for (y):
y = -x + 4 now that we know what y equals, plug it into the other equation.
2x +2x -8= 16
4x = 24
We now have a solid value for "x" and can put into the equation that we found for "y"
y = -x +4
y = -(6) +4
(6,-2) is the solution to the system of equations.
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There are a few ways to find it, but it is best to stick with whatever method you know best and are comfortable with. A test just wants the right answer, not how you get it :)
If you want to solve by addition then:
You have to add a multiple of the second equation to the first equation to try to cancel out the variables. Then carry on with regular algebra to solve for the other variable.