Adam currently runs about 20 miles per week and he wants to increase his weekly mileage by 30%. how many miles will adam run per week?

What aspects of lines have to be diffrent

Answer this question! 30 points and brainliest!

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?