Tuesday

September 30, 2014

September 30, 2014

Posted by **saranghae12** on Monday, April 9, 2012 at 10:57pm.

7x - 2y = 5

x = y

If you could explain and show this step by step, it would help a lot.

How would you solve the problem below using combination method?

3x - 2y = 12

-3x + 8y = -6

If you could explain and show this step by step, it would help a lot.

Thank you.

- 7th grade math -
**PsyDAG**, Tuesday, April 10, 2012 at 2:22pmSubstitute x for y in first equation and solve for x. If they were not exactly equal, insert that value into the second equation and solve for y. Check by inserting both values into the first equation.

Combination method

Add the two equations.

6y = 6

y = 1

Insert that value into one equation and solve for x. Check by inserting both values into the other equation.

**Answer this Question**

**Related Questions**

7th grade math - How would you solve the problem below using the subsitution ...

math,algebra II - I need someone to explain to me step by step the process of ...

7th grade math - can't figure this out! - A certain computer can perform 10^5 ...

Grade 11th Maths - (Second Time posting this problem)This problem is related to ...

7th grade math - Solve by applying the counting principal. When using a four ...

Grade 11th Maths - This problem is related to Chapter-Sets. Please solve the ...

Subsitution Method Grrr - Please show me the steps and solve. 3x+5y=1025 x+5=275

subsitution method - Can some one show me how to use the Substitution method to ...

Pre-Algebra - Can anyone show me step by step how to solve this problem? 26cm/s...

Pre-Algebra - Can anyone show me step by step how to solve this problem? 26cm/s...