Question

x=5 and 2 x+y=10 what is x and y?

Answer 1

since you are given x then x=5
now you plug in x into the equation which is
2(5)+y=10
which equals to 10+y=10
minus 10 on both sides to get y by itself
y=10-10
y=0

Answer 2

Y=0 y+2(5)=10 y+10=10 minus 10 away on both sides