Answer:
This means the length of the side of an area, a rectangle for example, is always the same : If the side of the rectangle are a and b, then a+b times two is fixed, or, which is the same, the sum a and b is fixed.
Step-by-step explanation:
let x =the number
81+x=3x-39
group like terms
81+39=3x-x
120=2x
120/2=2x/2
60=x
therefore x =60
2 3 − 3 2 − 8 − 3
haha thanks for the points btw the answer is. h2t=th6
y minus 3 = 2x plus 1
