samantharobinso1
contestada

HELP ASAP PLEASE!!! WILL MARK BRAINLIEST!!!

If the sum of x and y is 90 and y is 6 more than four times x, which of the following systems of equations could be used to solve for x and y?

A. x+y =90
6x-y= -4

B. x+y=90
4x-y= -6

C. x+y=90
x-4y=6

D. x+y=90
4x-y=6

Respuesta :

jerichsen

B, because first of all, y = 4x + 6, so you could cross off A. It can't be C either because there are 4x, not 4y. And it can't be D because Y is also 6 more. If it was 6 more, 4x - y would be a negative number since y is more than 4x.

abidemiokin

The two equations that could be used to solve for x and y are  x + y = 90 and y = 4x + 6

Simultaneous equation

Let the unknown numbers x and y

If the sum of x and y is 90, hence;

  • x + y = 90 ..... 1

If y is 6 more than four times x, then;

  • y = 4x + 6 ....... 2

Hence the two equations that could be used to solve for x and y are  x + y = 90 and y = 4x + 6

Learn more on simultaneous equations here: https://brainly.com/question/16863577

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