30c+3d What you do is combine like terms, so you combine to to C’s and then combine the to D variables. Once you do that, you get 30c+3d Hope this helped:)
Step-by-step explanation: multiplying both sides by 100 and dividing both sides by 70 then we have x=56 x 100/70 then your answer is x=80. If you're using a calculator, simply enter 56x100 divided by 70 which will give you the answer
