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3.2 Applications Worksheet

Solve each system by elimination.
1) 3x + 5y = 322
3x - 10y =8
2) -6x + 10y=-8
7x - 20y= 1

3.2 Applications Worksheet Solve each system by elimination. 1) 3x + 5y = 322 3x - 10y-example-1

1 Answer

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2(3x + 5y = 322)
6x+10y=966
3x-10y=8

Canceled out the positive 10y and the negative 10y. Subtract the rest and you will receive the answer for x.

2x= 958
/2 =/2
X= 479

Solve for y. I’m going to use the first equation to find y.

3x+5y=322
3x+5(479)=322
3x+2,395=322
-2,395=-2,395
3x= -2073
/3 = /3
X= -691

2(-6x+10y=-8)
-12x+20y=-16
7x-20y= 1

Canceled out the positive 10y and the negative 10y. Subtract the rest and you will receive the answer for x.

-19x=-17
/-19 = -19
X=0.89

Solve for y. I’m going to use the first equation to find y.

7x-20y= 1

7(0.89)-20y= 1
6.23-20y=1
-6.23 = -6.23
-20y = -5.23
/-20= /-20
y= -0.2651
User Brian Carper
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