To answer this, you should "subtract" x+y=7 from 3x+y=45.
What is left is 2x=38, where x then equals 19.
Plug this value into any of the equations (I will choose x+y=7 for simplicity).
19+y=7, y=-12
Check this answer by plugging it into the other equation.
3(19) + (-12) =45
45=45 so it is correct
X=19 and Y=-12
Answer:
hi
Step-by-step explanation:
Answer: your answer is 36.3 cause it's half of 72.6.
Step-by-step explanation:
Answer: Option (1)
Step-by-step explanation:
Answer:
y = 5x
Step-by-step explanation:
since y varies directly as x then the equation connecting them is
y = kx ← k is the constant of variation
to find k use the condition y = 60 when x = 12, then
k =
=
= 5
y = 5x ← is the equation of variation