Answer:
y = -2x -2
x + 2y = 2
2x + y = -2 } x1
x + 2y = 2 } x2
2x + y = -2 } we eliminate 2x
2x + 4y = 4 } same signs subtract and different add respectively
-3y = -6
-3 -3
y = 2 (x , 2) we reserve
2x + (2) = -2 we take on the first equation and replace 2 on a coordinate for y
2x = -2 - 2
2x = -4
2 2
x = -2 (-2,2)
x y
Answer:
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Answer:
3x+4=13
Step-by-step explanation:
Answer:
x = plus or minus 4
Step-by-step explanation:
Let's first simplify this equation by dividing both sides by 3:
3x^2 48
------- = ------ becomes x^2 = 16
3 3
Taking the square root of both sides of x^2 = 16, we get x = plus or minus 4.
Ok. If you were to solve this by substitution you would get (8,-3). Solve for the first variable in one of the equations, then substitute the result into the other equation.
