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Amira
Mathematics
7 January, 19:24
Find the solution to the system of equations.
y=-4x-3
y=-2x+1
+5
Answers (
1
)
Yasmin Fletcher
7 January, 19:36
0
( - 2, 5)
Step-by-step explanation:
Given the 2 equations
y = - 4x - 3 → (1)
y = - 2x + 1 → (2)
Since both equations express y in terms of x, equate the right sides, that is
- 4x - 3 = - 2x + 1 (add 2x to both sides)
- 2x - 3 = 1 (add 3 to both sides)
- 2x = 4 (divide both sides by - 2)
x = - 2
Substitute x = - 2 into either of the 2 equations for corresponding value of y
Substituting x = - 2 in (2), then
y = - 2 ( - 2) + 1 = 4 + 1 = 5
Solution is ( - 2, 5)
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