How to solve the square root sign 49 = cubic root sign 8 of 4x

How to solve the square root sign 49 = cubic root sign 8 of 4x

4x²-√49=3√8
4x²-7=2
4x²=9
x²=9/4
X = 3 / 2 or - 3 / 2

How to solve the problem that x square plus 4x plus 4 minus 4x square plus 4x plus 1 under the root sign is greater than x

When x ∈ (- infinity, - 2), (- 1 / 2), (- 1 / 2), (- 1 / 2), (- 1 / 2), + ∞), x + 2 | - 2x + 1 | = (x + 2) + (2x + 1 | = (x + 1)), x + 2 | - 2x + 1 | > x is equivalent to: | x + 2 | - 2x + 1 | > X

3x+4y=16 -4x+y=3

3x+4y=16 (1)
-4x+y=3 (2)
(1) - (2) X4
19x=16-12
19x=4
x=4/19
-4x+y=3
y=3+4x
y=3+16/19
y=73/19

28 × 13 + 18 =? Simple calculation!

28×13+18=28×(10+3)+18=28×10+28×3+18=280+84+18=364+18=382

A job, a alone to do 36 days to complete, B alone to do 18 days to complete?

If the total workload is 1, then
The daily workload of a is 1 / 36, while that of B is 1 / 18,
The cooperation between Party A and Party B should be completed in y days,
(1/36+1/18)y=1
y=12
A: the cooperation between Party A and Party B should be completed in 12 days
The above is for reference only. I hope it can help you

Is there a simple operation for 16 and 3 / 7 times 2.4 + 3 and 1 / 7 divided by 5 / 12-2.4? 2006 / 2005 times 2007
There must be a number and a process

4 + 3 and 1 / 7X2. 4-2. 4 = (16 and 3 / 7 + 3 and 1 / 7-1) x2. 4 = 18 and 4 / 7x12 / 5 = (20-10 / 7) X12 / 5 = 20x12 / 5-10 / 7x12 / 5 = 48-24 / 7 = 48-3 and 3 / 7 = 44 and 4 / 72005 / 2006x2007 = 2005 / 2006x2006 + 2005 / 200

1/x+1/2x+1/3x. 12/m²-9=2/ 3-m. 5c/6a²b+7a/8b²c-b/12a²c. a+b/ab-b+c/bc

1/x+1/2x+1/3x.=(6+3+2)/6x=11/6x12/m²-9=2/ 3-m.12/(m²-9)=-2(3+m)/(m²-9)12=-6-2m2m=-18m=-95c/6a²b+7a/8b²c-b/12a²c.=(20bc²+21a²c-2b³)/24a²b²ca+b/ab-...

Eight times eight is 13 times five?
..
As shown in the picture
Please give reasons.
Don't use slope.

OK, I don't need to explain the slope to you. Why is this: 8 * 8 = 13 * 5? 1. If you cut the left picture in the above way, you can't make a rectangle of the right picture at all (the picture is small, it can't be distinguished by the naked eye, so it needs accurate calculation.)

If the solution of equation 6x + 8x = 28 is the same as that of equation 6x-4x + 3x = 8m + 3M + 9m, find M
emergency

The first equation is 14x = 28
x=2
Take x = 2 into equation 2
5x=20m=5*2=10
m=0.5

Calculation: (- 81) △ 2 / 1 / 4 × 4 / 9 △ (- 15)