Question 171363
your 2 equations are:
y = 4x
y = 2x+6
since both equations equal to y, then they both must be equal to each other.
so.......
4x = 2x + 6
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this is the same as saying substitute 4x for y in the second equation because y = 4x from the first equation.
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4x = 2x + 6
simplify:
2x = 6
x = 3
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now you have x, you can solve for y.
in the first equation.
y = 4x
y = 4*3)
y = 12
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in the second equation.
y = 2x + 6
y = 2*3 + 6
y = 6 + 6
y = 12
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you get the same value of y and x in both equation so you have solved them simultaneously.
x = 3
y = 12
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