4 [2x-8] is equal to 24.4

4 [2x-8] is equal to 24.4

2x-8=6.1;
2x=14.1;
x=7.05;
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(5) The power of 2 minus 8 equals 0 (7) (x-1) (x + 1) = 1 (x-1), and the power of 2 equals the power of 2 (2x + 3)

x²-8=0
x²=8
x=±2√2
（x-1）(x+1)=1
x²-1=1
x²=2
x=±√2
（x-1）²=(2x+3)²
(2x+3)²-(x-1)²=0
(2x+3+x-1)(2x+3-x+1)=0
(3x+2)(x+4)=0
x1=-2/3 x2=-4
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How much is eleven out of twenty plus three out of seven?

Add and subtract three out of seven fractions with the same denominator,
The final answer is: 20 out of 21

How much is 2 / 7 × 3? How much is 13 / 49 × 21? How much is 7 / 30 × 2

2 / 7 is equal to 6 / 7;
13 × 21 of 49 is equal to 39 of 7;
7 / 30 × 2 is equal to 7 / 15;
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