Sunday

September 21, 2014

September 21, 2014

Posted by **jessica** on Wednesday, May 9, 2007 at 1:02am.

Solve by using addition or substitution or addition.

10x+2y=7

y=-5x+3

the answer my got was x=11/10

y=-2

My teacher said that was wrong.

Never mind this post I found out how to solve it.

Try substitution.

10 x + 2(-5x +3) = 7

That leads to 6=7, which cannot be true.

Therefore the two equations are inconsistent and there is no solution. Another way to look at it is to say the equations are for two parallel lines that never intersect.

2y=7-10x

y=3-5x

(2y=7-10x) mulitipy by 3

(y=3-5x) multiply by -6

6y=21-30x

-6y=-18+30x

0/-/3 doesnt workkk

**Answer this Question**

**Related Questions**

Algebra - Solve by addition or substitution; 10x + 2y = 7 y= -5 + 3

algebra - Solve each of the following systems by using either addition or ...

algebra - Solve for s in this equation. Depreciation. D=C-s/n This is my answer ...

math,correction - can someone correct this for me. Directions: Solve the ...

Algebra 1 - Solve the following system by using either addition or substitution...

Algebra - Solve the system of equations using substitution. x + 4y = -5 3x - 8y...

need help in math, - Translate to a system of equations and solve using the ...

math - Can someone please check my work? Solve using substitution method 1. 3x+...

algebra - I have a few problems I need you to take a look at and tell me if I ...

Algebra - I have a few problems I need you to take a look at and tell me if I ...