Solve each pair of simultaneous equations by substitution method
2 answers:
Answer:
x = 1 and y = -4
Step-by-step explanation:
Let's substitute y = -4x into x + 3y = -11
x + 3(-4x) = -11
x - 12x = -11
-11x = -11
/-11 /-11
---------------
x = 1
You can plug x = 1 into either of the given equations. Let's do x + 3y = -11
1 + 3y = -11
-1 -1
-----------------
3y = -12
/3 /3
-----------------
y = -4
Your values are, x = 1 and y = -4.
Answer:
x = 1 y = -4
Step-by-step explanation:
- Plug the value of y into the other equation.
x + 3y = -11
x + 3(-4x) = -11
x - 12x = -11
-11x = -11
x = 1
- Now substitute the value of x into any equation.
y = -4x
y = -4(1)
y = -4
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