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kevin72937
28.07.2019 •
Mathematics
At which coordinate point do they intersect? x+y=-2 and y=4x+3
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Ответ:
Step 1: Solve for either x or y in 1 of the 2 equations.
x + y = -2
- x - x
y = -x - 2
Step 2: Plug in the expression you got for x or y into the opposite equation.
-x - 2 = 4x + 4
+ 2 + 2
-x = 4x + 6
-4x - 4x
-5x = 6
-5 -5
x = -6/5
Step 3: Plug in the value for x or y into the equation you didn't use in Step 2.
-6/5 + y = -2
+ 6/5 + 6/5
y = -4/5
(x,y) = coordinate pair
(-6/5, -4/5) = final answer
Ответ: