He spent 333 min talking with his friends or 5.55 hours.
Answer:
x=-3
y=4
Step-by-step explanation:
2x-y=-10
y=4
Substitute y = 4 into the first equation
2x-(4) = -10
2x -4 = -10
Add 4 to each side
2x-4+4 = -10+4
2x = -6
Divide each side by 2
2x/2 = -6/2
x =-3
It simplifies to 27/70 if you use a calculator and do the math right
Both equations have as the left hand side.
Then, in a situation like
we can deduce , since they both equal
So, we can set up the equation
The solutions are
From the second equation we know that y is one more than x, so we have
Answer:
x=1
Step-by-step explanation:
You can divide by 3 on both sides instead of distributing.
x+2=9÷3
x+2=3
x=3-2
x=1