Maths problems, will you be able to do it all wright?

Ecuations

100

x (7+6)=26

¿x?

x=2

150

X·7 = 9X  - 8

¿X?

X=4

200

x·0,75 + x·0.75 = 1,5x

true or false?

true

300

x+x·05=x·075 + 0,75·x

true or false?

true

400

2x + 8x - 64 -4·4= 2 (8/4) + 12/2 - 10 

¿x?

X= 8

Second grade ecuations

100

x² + 9 = 5²

¿x?

x=4

150

2 · √ 16 = 89 - x²

¿x?

x=9

200

216 -100 = √ 14 - √ 10

true or false?

false

300

(45 :5)²  - (-2) · (-28) = x²

¿x?

x=5

400

1x² -3x + 5 = 0

¿x? 

x=4 and x=-1

percentages

100

25% of 300 = x

¿x? 

x=75

150

40 · 0,2 + 20 · 0,1 = x

¿x?

x=10

200

x+15%-15% = x

true or false?

false

300

I bought a T shirt for 50 $, if that had a 30% of disscount, what was the first price?

71,42$

400

The T-shirt i bought for 50 $ with the 30% of disscount, which price was increased by a 40% in the actual price. How much would I have to pay if I want to buy another one?

70$

radicals

100

factorize this number: 3888

3888= 2⁴ · 3⁵

150

extract factors of this radical: ⁴√ x⁹ ·y⁴ · z³

x² · y^{4  4}√ x · z³

200

⁷√ 5² · ⁷√ 5³ = x

¿x?

x= ⁷√ 5⁵

300

³√ 4 - 3 ³√ 4 + 5 ³√ 4

3 ³√ 4

400

√ 2 · (√ 3 + √ 2) = x

¿x?

√ 3 ·2 + 2

mix of all

100

x - 43 = √ 49

¿x?

x=50

150

If a coat costs 500$ and they increase its orice by the 35% but then they reduce it by 40%, what is the final price?

405$

200

√ 16 = 4

true or false?

false, √ 16 = +-4

300

4x + 35 - √ 1296 = 19

¿x?

x=5

400

1x² + 4x - 5

¿x?

x=1 and x=-5