SOLUTION: 0.1x+0.7y=-2.3
0.3x-0.2y=2.3
solve the system using substitution method
Algebra.Com
Question 427984: 0.1x+0.7y=-2.3
0.3x-0.2y=2.3
solve the system using substitution method
Answer by mananth(16949) (Show Source): You can put this solution on YOUR website!
0.1x+0.7y=-2.3
0.3x-0.2y=2.3
multiply both equations by 10
x+7y=-23
3x-2y=23
x+7y=-23 .............1
-2y=23-3 x---------2
/-2
y=-11.5- 1.5x
Plug the value of y in (1)
x+7(-11.5+1.5x)= -23
x-80.5+10.5x)=-23
x+10.5x= -23
11.5x=57.5
/11.5
x=5
Plug the value of x in (1)
x+7y=-23
5+7y=-23
5+7y=-23
7y=-28
/7
y=-4
RELATED QUESTIONS
Solve using the principle of zero products
(x - 2)(2x + 8)(3x + 9) = 0
this is what i... (answered by JBarnum)
Solve the system of equations by using the elimination method.
{9x^2+5y^2 = 45
{6y^2... (answered by ikleyn)
Solve for x or y and make the system equal to each other and solve:
2x+y=7
3x-y+3
(answered by JBarnum)
CRAMER RULE, ELIMIATION OR SUBSTITUTION METHOD, AND MATRICES PRACTICE PROBLEMS
1. (answered by richard1234)
How to solve using the substitution method
x^2+y=5
x-y+3=0
(answered by amarjeeth123)
Help with pre cal substitution questions!!
Solve Using Substitution
2x+4=4
(X+1)^2 (answered by ikleyn)
Can you help me solve these equations using the substitution method?
1) x-y=15; y=-4x (answered by ankor@dixie-net.com)
Solve the following linear programming problem using the corner-point method.
Maximize:... (answered by Fombitz)
Solve the system by addition or substitution.
3x + 6y = 0
x =... (answered by cowess)
Solve the system by addition or substitution.
3x + 6y = 0
x=2/3 (answered by stanbon)