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a(c - 5d) - 5b(c + 5d)
c - 5d = 2 2c + d = 4 Multiply eqn 1 by 2: 2c - 10d = 4 Subtract this from eqn 2: 0c + 11d = 0 which implies that d = 0 Then, by eqn 1, c = 2
4/5d=32 We move all terms to the left: 4/5d-(32)=0 Domain of the equation: 5d!=0 d!=0/5 d!=0 d∈R We multiply all the terms by the denominator -32*5d+4=0 Wy multiply elements -160d+4=0 We move all terms containing d to the left, all other terms to the right -160d=-4 d=-4/-160 d=1/40
It is: 2d+9
(27/3.14-.5d)2 x 3.14