Use the substitution method to find all solutions of the system of equations.
1st equation: y = 6- 4x
We put y in the second equation:
5x + 2(6-4x) = 6
5x +12 -8x = 6
-3x = -6
x = 2
We put the value of x back into 1st equation:
y = 6 -4*2 = -2
Solutions: x = 2
y = -2
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