Solving Equations with Substitution

Adding

100

12+x=-30

A: -42

B: -18

C: 18

D: 42

A: -42

200

-6y+10y=-48

A: -48

B: -12

C: -3

D: 3

E: 12

B: -12

300

38+x=290

x=252

Subtracting

100

28=d-12

A: 40

B: -40

C: 16

D: -16

A: 40

200

15=c-35

A: 50

B: -50

C: 20

D: -20

A: 50

300

x-480=20

x=500

Multiplying

100

24=-4z

A: 96

B: 6

C: -6

D: -96

C: -6

200

-5x=-20

A: -100

B: -4

C: 4

D: 100

C: 4

300

-35=-8m+m

A: -9

B: -5

C: 5

D: 9

C: 5

Dividing

100

 b/3=-9 

A: -27

B: -3

C: 3

D: 27

A: -27

200

 -8=d/-4 

A: -32

B: -2

C: 2

D: 32

D: 32

300

 s/-2 + s/-4 =12 

A: -16

B: -12

C: 12

D: 16

A: -16

Word

100

Brinley has 128 inches of elastic. She needs a piece that is 16 inches long to make one headband. The equation 128=16h can be used to find h, the number of headbands Brinley can make. Use the equation to determine if Brinley can make exactly 7, 8, or 9 headbands.

She can make 8 headbands

200

Maddox has $21 to spend on suvenirs as a gift for his friends. He wants to buy each friend a keychain and a pin. The equation 3f+4f=21 can be used to find f, the number of friends for which he can buy souvenirs. Use the equation to determine if Maddox can buy souvenirs for 3, 4, or 5 friends.

3 friends

300

I like the courage. Have 300 points.

(Everyone)