2v-17< 15 solve the inequality

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

One of the complementary angles is 4 degrees mor than the other. find the angles (recall that complementary angles are angles whose sum is 90 degrees.) which of the following can not be used to solve the problem if x represents one of the angles? a. 2x-4=90 b. 2x+4=90 c. x+4=90