Simplify
3x+4-5x+15
-2x+19
Aliyah had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?
7x+10=24
7x=14
x=$2
2(3x)+5-4x+2
2x+7
You bought a magazine for $5 and four erasers. You spent a total of $25. How much did each eraser cost?
5+4x=25
4x=20
x=$5
4(x+3)-x-6
3x+6
Sumalee won 40 super bouncy balls playing horseshoes at her school's game night. Later, she gave two to each of her friends. She only has 8 remaining. How many friends does she have?
2x+8=40
2x=32
x=16
3(6x+2)+(-2x+4)
16x+10
For a field trip 4 students rode in cars and the rest filled nine buses. How many students were in each bus if 472 students were on the trip?
9x+4=472
9x=468
x=52