If A = 5a - 7b + 7, B = -4a - 7 + 4b, C = 9a - 7 - 2b, and
D = 14b – 2a + 4, find the value of
A + 2B + C + 2D.
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put the values of A,B,C and D in A+2B+C+2D
=A+2B+C+2D
=5a-7b+7+2(-4a-7+4b)+9a-7-2b+2(14b-2a+4)
=5a-7b+7-8a-14+8b+9a-7-2b+28b-4a+8
=5a-8a+9a-4a-7b+8b-2b+28b+7-14-7+8
=2a+27b-6 ans.
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