What is a equivalent expression for 8x+40y+12x

dates, whole equivalent values amount, in grams (g) amount, in ounces (oz) 1/8 cup 30 g 1 oz 1/4 cup 55 g 2 oz 1/3 cup 75 g 2.6 oz 3/8 cup 85 g 3 oz 1/2 cup 115 g 4 oz 5/8 cup 140 g 5 oz 2/3 cup 150 g 5.3 oz 3/4 cup 170 g 6 oz 7/8 cup 195 g 6.9 oz 1 cup 225 g 7.9 oz 2 cups 450 g 15.9 oz 4 cups 900 g 31.7 oz


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2 and y+4

That ratio is 3/4, height/base, in both triangles. Is that what you mean?

Ratios are normally expressed as a fraction, not a decimal.
.

One third.

Let's rewrite as

7(3x+5) = 8x -1(1-4x)
Let's distribute
21x + 35 = 8x -1 + 4x
collect like terms
21x + 35 = 12x -1
Put all the x's on one side by subtracting 12x from both sides
21x -12x + 35 = 12x -1 -12x
simplify
9x + 35 = -1
get all the constants on the right side
9x + 35 - 35 = -1 - 35
9x = -36
divide both sides by 9 to get x by itself
9x /9 = -36/9
x = -4

check in original equation

7(3(-4)+5) = 8(-4) -(1-4(-4))
7(-12+5) = -32 - (1+16)
7 (-7) = -32 - (17)
-49 = -32-17
-49 = -49

Fractions can be more precise than decimals. For example: 1/3 can not be expressed exactly as a decimal. .33333333333333333333333333333333333333333... is only an approximation.
Some numbers cannot be expressed precisely as either a fraction or a decimal. pi is an example.

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