Solve using substitution method x-y=11;3x+10y=-6 explain please

1 answer:

6 0

Ok so for starters you want to choose an equation and solve for a variable.
So, I am going to choose x from the first equation.
Add y to both sides and you get x=11+y
Next, substitute 11+y for x in the other equation so you get...
2(11+y) +10y=-6
Next distribute the 2 throug the 11 and the y
22+2y+10y=-6
12y=-28
y=-28/12
reduce this fraction to make this easier.
y=-7/3
Now plug in why to either of the equations to find x
x-(-7/3)=11
x+7/3=11
x=11-(7/3)
x=(33/3)-(7/3)
x=26/3
so x = 26/3 and y = -7/3
you can also check to see if this is correct by substituting each of these values into the equations.

You might be interested in

You are going to create a circle graph to represent some data. How many degrees should a section representing 65 out of a hundre

hjlf

To figure out the degrees, you would create a ratio.

Since there are 360 degrees in your circle, that would be representative to 100 (because both are the total of what you want to find), and x would be representative to what degrees 65 is equal to.

your ratio should look like,

65/100=x/360

cross multiply and get

65(360)=100x

23400=100x

x=234

It looks hard to read like this, but if you write it out on your paper it should make more sense!

8 0

3 years ago

Solve for x by factoring and using the zero product property <br><br>3x^2-13x-10=0

leonid [27]

move all terms to the left side and set equals to zero. then set each factor equal to zero