Answer:
21 + 22 + 23 +24 = 90
Explanation:
Let's represent this with x:
x+x1+x+2+x+3 = 90
Group the x's together
4x+6 = 90
subtract 6 on both sides
4x=84
x=84/4
x= 21
x, x+1, x+2, x+3.
I took the test
5.9m questions
7.7m answers