You are here:

Algebra/Linear equations


Solve the linear equations using any algebraic method. Check your solution if possible.


The 1st equation easily converts to an equation of y by adding 3x to both sides.
That makes it be y = -2 + 3x.

Putting this in the 2nd equation gives -2x +3(-2+3x) = 15.
Multiplying this out gives -2x - 6 + 9x = 15.
Combining the x terms and adding 6 to both sides gives 7x = 21.
Dividing by 7 gives x = 3.

This gives -9 + y = -2, so adding 9 to both sides gives y = 7.

Checking on the second equation gives -2*3 + 3*7 = -6 + 21 = 15, which is what was given.

From this, we can see that it is done correctly.


All Answers

Answers by Expert:

Ask Experts


Scott A Wilson


Any algebraic question you've got. That includes question that are linear, quadratic, exponential, etc.


I have solved story problems, linear equations, parabolic equations. I have also solved some 3rd order equations and equations with multiple variables.

Documents at Boeing in assistance on the manufacturiing floor.

MS at math OSU in mathematics at OSU, 1986. BS at OSU in mathematical sciences (math, statistics, computer science), 1984.

Awards and Honors
Both my BS and MS degrees were given with honors.

Past/Present Clients
Students in a wide variety of areas since the 80's; over 1,000 of them have been in algebra.

©2017 All rights reserved.