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3 years ago

What is seven decreased by 3 times some number

Mathematics

2 answers:

MArishka [77]3 years ago

8 0

Answer:

7 - 3x

Step-by-step explanation:

let "some number" = x

"3 times x" = 3(x)

"seven decreased by" 7 -

Put together the phrases.

"seven decreased by 3 times x" is 7 - 3x

7 - 3x is your answer

natulia [17]3 years ago

5 0

the answer to the question is 7-3x.

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2 years ago

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Solve the system by substitution Y= -7x + 6 Y = - 10x Plz help

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Answer:

(-2, 20)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Algebra I

Coordinates (x, y)
Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

y = -7x + 6

y = -10x

Step 2: Solve for x

Substitution

Substitute in y [1st Equation]: -10x = -7x + 6
[Addition Property of Equality] Add 7x on both sides: -3x = 6
[Division Property of Equality] Divide -3 on both sides: x = -2

Step 3: Solve for y

Substitute in x [2nd Equation]: y = -10(-2)
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