Answer:
15
Step-by-step explanation:
Let x represent the number of algebra problems. Then the number of geometry problems was 27-x and the total working time was ...
2x +5(27 -x) = 90
-3x = 90 -135 . . . . subtract 135
x = -45/-3 = 15 . . . divide by -3
Rob had 15 algebra problems for homework.
Answer:
The cost of the television is 
Step-by-step explanation:
Let
x -----> the cost of the television in dollars
we know that
The cost of the television represent 100%
<em>If Matt pays cash</em>
then

so
The cost is 0.93x
<em>If Matt pays with a loan</em>
then

so
The cost is 1.1x
The difference between the two methods is

Remember that
The difference between the two methods is $49.98
so

Solve for x

This is the answerrrrrrrrr
8y+4 = 2(y-1)
8y+4 = 2y-2
8y-2y+4 = -2
6y+4 = -2
6y = -2-4
6y = -6
y = -1