9)
x = 90 - 42
x = 48
Answer
48
10)
Sum of interior in a triangle = 180
Plug in
x + 2x + 2x + 15 = 180
5x + 15 = 180
5x = 165
x = 33
Answer
33
Step-by-step explanation:
2/3+3/5
=10+9/15
=19/15
The mistake she made was that she didn't took right LCM.
48 divided by 12 would be 4 she can get 4 shirt at the most so the inequality would be 12x is less than or equal to 48 the answer is A
Note the equal sign. What you do to one side, you do to the other. Isolate the x.
Subtract 4 from both sides
x + 4 (-4) = 11 (-4)
x = 11 - 4
x = 7
7 is your answer for x.
hope this helps