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miskamm [114]
3 years ago
14

What is the value of x?

Mathematics
2 answers:
Aleksandr [31]3 years ago
8 0
100 + x-4 +3x =180
x = 21
hope it help
Mekhanik [1.2K]3 years ago
6 0
Put all the angles = 180 (for a triangle's sum is 180 degrees)

x - 4 + 100 + 3x = 180

Add numbers (& common variables) together

3x + x + 100 - 4 = 180

4x + 96 = 180

isolate the x, subtract 96 from both sides

4x + 96 (-96) = 180 (-96)

4x = 180 - 96

4x = 84

isolate the x, divide 4 from both sides

4x = 84

4x/4 = 84/4

x = 84/4

x = 21°

hope this helps
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2 years ago
A wallet contains $460 in $5, $10, and $20 bills. The number of $5 bills exceeds twice the number of $10 bills by 4, and the num
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Answer:

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Step-by-step explanation:

Let x number of $5, y number of $10 and z number of $20

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Therefore, x = 2y + 4

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    5(2y+4) + 10y + 20(y-6) = 460

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  • Put the value of y into z = y - 6 and solve for z

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3 0
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