60 + 90
GCF = 30
(30 * 2) + (30 * 3) = 30(2 + 3) <== the correct way
The mistake Axial made was he did not pick the greatest common factor...he picked 3 instead of 30.
A = 5/6(B + C)
multiply 6 on both sides
6A = 5(B + C)
divide 5 from both sides
6A/5 = B + C
subtract B from both sides
6A/5 - B = C
<ADB = 90 degrees
hope it helps
