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4 years ago

14

Please help me Solve: 2x-3=6

2 answers:

ratelena [41]4 years ago

5 0

2x-3=6
2x=9
x=9/2=4.5
.............................

elixir [45]4 years ago

4 0

OK. Here we go:

Step #1: Write the equation on your paper.

Step #2: Add 3 to each side of the equation.

Step #3: With the result of step-#2, divide each side of the equation by 2.

If your result of step-#3 is not 4.5, then go back to step-#1, and go through
all 3 steps again, trying to be more careful and focused.

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3 years ago

Which ordered pairs are solutions to the inequality 2x+y>−4?

hichkok12 [17]

we will proceed to resolve each case to determine the solution

we have

$2x+y>-4$

$y>-2x-4$

we know that

If an ordered pair is the solution of the inequality, then it must satisfy the inequality.

<u>case a)</u> $(5,-12)$

Substitute the value of x and y in the inequality

$-12>-2*5-4$

$-12>-14$ ------> is True

therefore

the ordered pair $(5,-12)$ is a solution of the inequality

<u>case b)</u> $(-3,0)$

Substitute the value of x and y in the inequality

$0>-2*-3-4$

$0>2$ ------> is False

therefore

the ordered pair $(-3,0)$ is not a solution of the inequality

<u>case c)</u> $(-1,-1)$

Substitute the value of x and y in the inequality

$-1>-2*-1-4$

$-1>-2$ ------> is True

therefore

the ordered pair $(-1,-1)$ is a solution of the inequality

<u>case d)</u> $(0,1)$

Substitute the value of x and y in the inequality

$1>-2*0-4$

$1>-4$ ------> is True

therefore

the ordered pair $(0,1)$ is a solution of the inequality

<u>case e)</u> $(4,-12)$

Substitute the value of x and y in the inequality

$-12>-2*4-4$

$-12>-12$ ------> is False

therefore

the ordered pair $(4,-12)$ is not a solution of the inequality

<u>Verify</u>

using a graphing tool

see the attached figure

the solution is the shaded area above the line

The points A,C, and D lies on the shaded area, therefore the ordered pairs A,C, and D are solution of the inequality

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