Question 717047
2a+5=a+7


Subtract 5 from each side of the equation.

2a + 5 - 5 = a + 7 - 5

Combine like terms:

5 - 5 = 0

7 - 5 = 2

Therefore

2a = a + 2

Subtract a from each side of the equation.

2a - a = a + 2 - a

Combine like terms:

2a - a = a

a - a = 0

Answer:

a = 2



Lennox Obuong
Algebra Tutor