Add 7 to both sides:
3x = 18.
Divide by 3:
x=6.
The area of a triangle is given by:
Area= 1/2 ×Base × Height:
1/2 x 10 x 12 = 60sqm.
The area of a rectangle is given by Area=Length × Width:
8×5 = 40square meters
The square root of 64 is 8, since (−8)2 = 64 and 82 = 64.
Combine like terms by adding the coefficients of x:
5x+7x = 12x.
