Variables

Like terms

100

3a + 4a

7a

200

-3a + +5b+4a -7a -8b

-6a-3b

300

9x²y² + 3x²y -11x²y²-8xy +2yx²

-2x²y² +5x²y-8xy

400

8x⁴-7x³+4x⁴+2y³-7xy+3y³+12xy

12x⁴-7x³+5y³+5xy

500

When combining like terms, how do I know the order in which to arrange them?

They start with the highest exponent and then go down incrementally.

Substitution

100

What is w+2.8 when w = 6.4?

9.2

200

-12 - m 

m = 3

-15

300

What is the solution to the problem below if x=3/4?

5/4- x =

2/4

400

What is the solution if x=-5 and y=-8

10+ 3xy

-110

500

What is the solution if x=-2, y=-9 and z=4

700-x(y-z)

74

Solve for the Variable

100

x+7=15

x=8

200

m² - 4   

m= -5

21

300

2a+5=17

6

400

4(f-1)=20

f=6

500

w/5=9

w=45

Solve for variable with fraction

100

x/2= 3/4. Simplify your answer.

3/2 or 1 1/2

200

x+ 1/5= 7/10. Simplify your answer.

1/2

300

(x+1)/6 =2/3

x=3

400

5/2-x=1/4. Simplify.

9/4 or 2 1/4

500

-3/4x = 9. Simplify.

-12

Solve for variable 2 or more steps

100

1/2x+3= 7. Simplify.

x= 3.

200

1/5x-4=2

x=30

300

n-7/9=4/6

n=13/9

400

d-9/4=2/8. Simplify.

d=5/2 or 2 1/2

500

-2/12= -5/15+m. Simplify.

m= 1/6