27-02-2015
Mathematics

Answered

9x + 4y = 7
6x - 4y = 2

Answer :

Аноним Аноним

27-02-2015

I used the elimination method:

Multiply 9x+4y=7 by 2: 18x+8y=14
Multiply 6x-4y=2 by 3: 18x-12y=6

{18x+8y=14}
{18x-12y= 6}

18x-12y=6
-
18x+8y=14
_____________
-20y= -8

{18x + 8y = 14}
{-20y= -8}

Isolate y
y= 2/5 For 18x+8y=14 plug in y=2/5
Sovle 18x+8(2/5)=14 for x: x=3/5

THE SOLUTIONS FOR THE SYSTEMS OF EQUATIONS ARE:
y= 2/5, x=3/5

Answer Link

Other Questions

if a number is multiplied by 4 it gives the same result as 27 of 504 what is the number

Find the value if r so that the line passes through each pair of points has the given slope PLEASE HELP 6A 26r4 m5 6B r658 m8

writing to explainKevin wants to buy a new stereo for 239so far he has saved 115 Explain how you can use mental math to find out how many more money Kevin needs

Draw 8 lines that are between 1 inch and 3 inches long measure each line to the nearest fourth inch and make a line plot

What is the complement of 76 degrees

Witch 2 Continents have the most obvious fit of the coastlines

What was the plan for national government where states would keep their freedom and independence

Which helped George Washington in his first term as the first president of the United States A He made his advisers pledge not to argue about how the government

What is Y3x5 5x4y3

what is the value of x in the equation 13x2x48x1