Someone help me solve this math thingy?

Plantae is the plant kingdom which includes all plants on the earth. They are multi-cellular eukaryotes. They consist of cell walls and chlorophyll. Plants are photosynthetic. Hence, they have an autotrophic mode of nutrition. The plant kingdom is a vast group; therefore, the kingdom is further classified into subgroups. Level of classification is based on the following three criteria:

• Plant body- whether the body has well-differentiated structures or not.
• Vascular system-whether the plant has vascular system for transportation of substances or not
• Seed formation- whether the plant bears flowers and seeds or not; if it does, then whether it is enclosed within fruits or not.

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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

By solving -4*3 = -12

I disagree. Assuming that the bulbs are not connected together in either series or parallel, the answer is the five ohm resistor. The five ohm resistor passes twice as much current as the ten ohm.

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Let's look at the overall picture. Does it make sense if you have a fifth of a pizza and add a half pizza, you get less than a third of a pizza.

Now, into the math.
Here is a fifth of a pizza.


Here is half a pizza.



It is hard to add these two.

We find the least common multiple of the denominators 2 and 5 and get 10.

Let's redo the pizzas in 10 slices.



And the half pizza.




Now with the same sized slices, we can add the slices and calculate the result.


Now we have seven slices out of ten, or 7/10.

Good luck.

Paul

Area is 90.25 m2