Evaluate 5c-3d+115c−3d+115, c, minus, 3, d, plus, 11 when c=7c=7c, equals, 7 and d=8d=8d, equals, 8.
andrey2020 [161]
Answer:
use substitution
(5 x 7) - (3 x 8) + 11= 35 - 24 + 11= 22
When u add it stays the same but for subtraction u change the sign.
Example: 2- (-5)=7
You would subtract y on both sides so z-y then you get x=x. I think I hope this helps.
Step 1
Given;

Required: To solve the equation.
Step 2
Solve the equation

Answer;