X + 2x + 3 + 4 = 5x +7 +6x + 8

x = -1

Step-by-step explanation:

combine like terms on both sides  (like terms refers to the variable, x in this case) so

3x + 7 = 11x + 15

then get x terms to one side and non-x terms to the other

this gives you: 7 - 15 = 11x - 3x

                             -8 = 8x

dived both sides by 8 (since its the constant with x) which gives you

x = -1

hope I could help ( I messed up at first but I fixed it)

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this