Answer: 3x +5
Step-by-step explanation:
Group the variables first 8x-5x is 3x. Then look at the numbers -2+7 is 5.
You can't combine letters and numbers so it's as far as you can go.
Answer:

Step-by-step explanation:
Given

Required
Find a:b

Cross Multiply

Open brackets

Collect Like Terms


Divide through by -b



Represent as a ratio

The answer is basically just 4*4*4 so your answer is 64
Answer:
x = 9
Step-by-step explanation:
Each angle equals 60 since it is an equilateral triangle
7x-3 = 60
add 3
7x = 63
divide by seven on both sides
x = 9
I hope this helps!!