Thursday

July 24, 2014

July 24, 2014

Posted by **Anonymous** on Saturday, January 10, 2009 at 2:21pm.

Equations: (solve for t and z)

12t + 4z = 80

2t + 4z = 20

My answer: t = 2, z = 14

The steps:

(simplified it)

z = 20 - 3t, z = 5 - 0.5t

(equated both sides to isolate for t)

20 - 3t = 5 - 0.5t

t = 2

(sub t = 2 into one of the equations)

z = 20 - 3(2)

z = 14

--------

Equations: (solve for t and z)

z = 2 + 6t

z 20 - 3t

My answer: t = 2, z = 14

(I did the same steps like the previous question, my answer is kind of iffy because it's the same???)

- Basic Math -
**bobpursley**, Saturday, January 10, 2009 at 2:28pmYour answers are wrong.

20-3t=5-.5t does NOT come out t=2

redo that. Another quick way to do this is take your original equations, subtract the second from the first, and you get

10t=60 which is pretty fast to solve in your head.

- Basic Math -
**doug**, Saturday, January 10, 2009 at 2:43pm3

**Related Questions**

How do I do this.?(Math.) - Use the Substitution method to solve the system of ...

Calculus - For the parametric curve defined x=2t^3-12t^2-30t+9 and y=t^2-4t+6 .....

Math - How would I solve equations with variables on both sides? Please help!

Math - I am really have a tough time trying to solve this problem. I think my ...

math - Roberto's scout troop is making some birdhouses for the park district. ...

Math - How do you solve an eguation with 2 variables? You have to have two ...

College Algebra - Translate the problem into a pair of linear equations in two ...

Geometry :( - this maths problem is wrecking my head.... 1.find the points of ...

Math - Solve the system by addition or substitution. 3x – 4y = 8 6x – 2y = 10 ...

algebra - Translate the problem into a pair of linear equations in two variables...