-2b + 7 -3b = 2
-2b +7 -3b +2b = 2 + 2b
7 -3b + 3b = 2 + 2b +3b
7-2 = 2-2 + 2b + 3b
5 = 5b
1 = b
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3a + 2b = (3*6) + (2*5) = 18 + 10 = 283a+2b= (3x6)+(2x5)= 18+10=28
A = 2b + cSubtract 'c' from each side:A - c = 2bDivide each side by 2:b = 1/2 (A - c)
2a + 2b = c subtract 2a from both sides 2a - 2a + 2b = c - 2a 2b = c - 2a divide both sides by 2 (2/2)b = (c - 2a)/2 b = (c - 2a)/2 --------------------
a = 2b - c a + c = 2b (a+c)/2 = b b = (a+c)/2
b= 1/2 (a - c)