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25cotahai
20.12.2020 •
Mathematics
Solve the given system by substitution.
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Ответ:
(-3, -15)
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Algebra I
Solving systems of equations using substitution/eliminationStep-by-step explanation:
Step 1: Define Systems
n = 5m
n = 2/3m - 13
Step 2: Solve for m
Substitution
Substitute in n: 5m = 2/3m - 13Subtract 2/3m on both sides: 13/3m = -13Divide 11/3 on both sides: m = -3Step 3: Solve for n
Define equation: n = 5mSubstitute in m: n = 5(-3)Multiply: n = -15Ответ:
Step-by-step explanation:
5m = 2/3m - 13
15m = 2m - 39
13m = -39
m = -3
n = 5(-3)
n = -15
(-3, -15)
Ответ:
x = 9
Step-by-step explanation:
32 + 4 + 6x = 90 Set angles to be added to each other and equal to 90.
36 + 6x = 90 Combine like terms.
6x = 54 Subtract 36 from both sides.
x = 9 Divide 6 from both sides.