SOLUTION: solve by system of addition
3x - 2.5y =7.125
2.5x - 3Y =7.3125
Algebra.Com
Question 206606: solve by system of addition
3x - 2.5y =7.125
2.5x - 3Y =7.3125
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
3x - 2.5y =7.125 multipl by -2.5
2.5x - 3Y =7.3125 multiply by 3 & add
-7.5x+6.25y=-17.8125
7.5x-9y=21.9375
------------------------
0x-2.75y=4.125
y=4.125/-2.75
y=-1.5 ans.
3x-2.5*-1.5=7.125
3x+3.75=7.125
3x=7.125-3.75
3x=3.375
x=3.375/3
x=1.125 ans.
Proof:
2.5*1.125-3*-1.5=7.3125
2.8125+4.5=7.3125
7.3125=7.3125
RELATED QUESTIONS
Solve the system by addition. 5x – 3y = 5 x – 5y = 1
Solve the system by addition.... (answered by jim_thompson5910)
Solve the following system of equations.
1) 3x+5y=7
2)... (answered by richwmiller)
Solve the system by addition or substitution.
5x – 5y = 35
y = –7 + x
(answered by LilSkittleMd)
solve each system of linear equations by elimination
2x+5y=7
3x-3y=-21 (answered by nyc_function)
I need your help!
Solve the system by addition:
5x-4y= -5
x-2=... (answered by stanbon)
Solve the system by addition.
–3x + 5y = –18
x – 2y = 7
(answered by checkley75)
Solve the system by the addition method. Determine whether the equations are... (answered by jim_thompson5910)
What is the solution of the system? Solve the system by the elimination.
5x+5y=-7... (answered by MathLover1)
Solve the system by elimination.
1) -3x+y=7
4x-2y=3
2) 2x-3y=7
(answered by ewatrrr)
Solve the system by addition.
2x - 3y = 2
x - 5y = 1 (answered by jim_thompson5910)