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3 years ago

5x + 7 = 42, Is x = 7 the solution for this equation? Justify your answer for it is or it is not

Mathematics

2 answers:

Doss [256]3 years ago

7 0

Answer:

7 is a solution.

Step-by-step explanation:

Step 1: Write equation

5x + 7 = 42

Step 2: Solve for <em>x</em>

Subtract 7 on both sides: 5x = 35
Divide both sides by 5: x =7

tigry1 [53]3 years ago

7 0

Answer:

Step-by-step explanation:

5x + 7 = 42

5x = 42 - 7

x = 35 / 5

x = 7

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3 years ago

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3 years ago

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Akimi4 [234]

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3 years ago

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Ugo [173]

Answer:

$y=-3.2\\\\y=-2.2\\\\y=-1.8$

Step-by-step explanation:

Insert the given x values for the given equation to find the corresponding y coordinate:

$y=0.2x-2$

$x:-6,-1,1$

Insert -6:

$y=0.2(-6)-2$

Simplify multiplication (when multiplying a negative and a positive, the result will always be negative):

$y=-1.2-2$

Simplify (when subtracting from a negative number, add the values, but keep the negative symbol):

$y=-3.2$

Insert -1:

$y=0.2(-1)-2\\\\y=-0.2-2\\\\y=-2.2$

Insert 1:

$y=0.2(1)-2\\\\y=0.2-2\\\\y=-1.8$

:Done

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3 years ago