One-Step Equations
x+4=10
x=6
2x+5=-7
x=-6
4x+7x=44
x=4
Kimari went to the movies and spent $13 on tickets. She also bought 5 drinks. She spent a total of $23. How much was each drink?
5x+13=23
x=2 dollars for each drink
Problem written on board
They subtracted 2 when they should've subtracted 4, and the divided by 2.
x/3=14
x=42
x/3-10=-2
x=24
3(x-4)=27
x=13
There are 286 students on the field trip. 22 students rode in cars and the rest filled eight buses. How many students rode on each bus?
8b+22=286
b=33 students on each bus
problem written on board
they subtracted 4 first and they should have multiplied by 5 first since it is a big fraction.
x-(-3)=10
x=7
(x-3)/2=14
x=31
5+2(x+4)=25
x=6
Jaheem spent half of his monthly allowance at the store. His grandmother gave him $15 more dollars for washing her car. He now was a total of $25. What was his weekly allowance?
a/2+15=25
a=20 dollars is Jaheem's weekly allowance.
Problem written on the board
They forgot to distribute the 3 to the 4 in the first step
x-2/3=6/5
x=28/15
3x+1/2=3/5
x=1/30
3-2(2x+4)-4x=-21
x=2
Amiya worked for 5 hours on Sunday and then spent $10 at Bojangles for lunch. She had $65 at the end of the day. What is her hourly wage?
5h-10=65
h= $15 per hour
problem written on the board
they multiplied by the entire fraction, when they should have multiplied by just the denominator first.
2/5x=7
x=35/2
5-8x=-35
x=5
1/2(2/3x+6)-8=10
x=45
Maurice spent half of his weekly allowance on candy. To earn more money his parents let him wash the dog for $7.90. What is his weekly allowance if he ended with $14.30?
x/2+7.90=14.30
x=$12.80 per week
Problem written on board. There are TWO mistakes. You need to find both for full credit.
They first forgot to multiply 4 time -2, and then they combined their like terms incorrectly.