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Slove: x = 3y - 7
4x + 5y =- 11
show steps

User Navylover
by
7.8k points

2 Answers

7 votes

Answer: Solution: (-4, 1)

Explanation:

x = 3y - 7

4x + 5y = -11

Substitute x for 3y - 7

4x + 5y = -11

4 (3y - 7) + 5y = -11

12y - 28 + 5y = -11

17y - 28 = -11

Add 28 to both sides

17y = 17

y = 1

x = 3y - 7

x = 3(1) - 7

x = 3 - 7

x = -4

Solution: (-4, 1)

User Eduardo Leoni
by
8.6k points
10 votes

Answer:

1.1 Solve x-3y+7 = 0

recognizes that we have here an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK).

"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.

In this formula :

y tells us how far up the line goes

x tells us how far along

m is the Slope or Gradient i.e. how steep the line is

b is the Y-intercept i.e. where the line crosses the Y axis

The X and Y intercepts and the Slope are called the line properties. We shall now graph the line x-3y+7 = 0 and calculate its properties

Explanation:

The anser is in the screenshots

Slove: x = 3y - 7 4x + 5y =- 11 show steps-example-1
Slove: x = 3y - 7 4x + 5y =- 11 show steps-example-2
User Saranya Gupta
by
8.6k points

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