Question

The three Math Idol judges have been eliminating contestants all day! The number of one-step equations and two-step equations who have been eliminated today is equal to 1120. If three times the number of one-step equations minus twice the number of two-step equations is equal to 1300, how many two-step equations eliminated today?

I got 412

Answer 1

o = one step equations
t = two step equations

o + t = 1120 -->o = 1120 - t
3o - 2t = 1300

3(1120 - t) - 2t = 1300
3360 - 3t - 2t = 1300
-5t = 1300 - 3360
-5t = -2060
t = 412

yep...thats what I got

Answer 2

x=412 y=708

Answer 3

so 412 thanks guys

Answer 4

can you help me with one more question @tcarroll010

Answer 5

What is the value of the x variable in the solution to the following system of equations?

4x + 2y = 12
x - y = 3

Answer 6

do you prefer substitution or elimination ?

Answer 7

substitution

Answer 8

wiat is it 2

Answer 9

x - y = 3 ---> x = y + 3
now just sub y + 3 in for x in the 2nd equation
you can do this...you did the first one. Tell me what you get and I will do it and see if we get the same answer.

Answer 10

x is 2

Answer 11

@kelliegirl33 ???

Answer 12

sorry....I am back...let me check...hold on

Answer 13

4x + 2y = 12
4(y + 3) + 2y = 12
4y + 12 + 2y = 12
6y = 0
y = 0

x = y + 3
x = 0 + 3
x = 3

let me check it...
4x + 2y = 12
4(3) + 2(0) = 12
12 + 0 = 12
12 = 12 (correct)

No...I got x = 3 and y = 0

Answer 14

ok i see thanks a ton

Answer 15

no problem....glad to help :)

Answer 16

when in doubt...check it