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riadik2000 [5.3K]
3 years ago
12

X + 2y = 7 3x - 2y = -3

Mathematics
1 answer:
VladimirAG [237]3 years ago
4 0
Use Subtraction

1. Subtract
x+2y=7
3x-2y=-3
-------------
4x+0y=4 SIMPLIFY 4x=4

2. DIVIDE

4x=4
x=1

Substitute that into either of the original equations to get x=1, y=3





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When a number is decreased by 4%, the result is 93. What is the original number
romanna [79]

Answer:

<u>The original number is 96.875</u>

Step-by-step explanation:

Let's find the original number using the Direct Rule of Three, this way:

       Percentage          Number

              100                       x

               96                       93

***********************************************

96x = 93 * 100

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x = 9,300/96

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Step-by-step explanation:

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BartSMP [9]

Answer:

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Step-by-step explanation:

To find the value of x we can use either sine or cosine

Using cosine we have

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8 0
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Read 2 more answers
Equation A: y = 2x + 4
Ymorist [56]
2x+4=3x+1 they've substituted y =2x+4 into the second eq.
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