Just plug in the numbers for the variables.
20+3(8)+17(2)=
The answer is -37! You would substitute the numbers you were given for the variables so the equation would become 5(3) -3 + 7(-7)
32^(2c)=8^(c)+7
2^10c=2^3c+21 im gonna assume 7 is in the exponent
10c=3c+21
7c=21
c=3
7 is 70 out of 1/10.
please give thanks if i am correct, i think this is the question you're asking.