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Q: What is x when 10x plus 9equals 8x plus 21?

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2x-3=10x+21 2x-3-2x=10x+21-2x -3=8x+21 -3-21=8x+21-21 -24=8x -3=x

2x-3 = 21+10x 2x-10x = 21+3 -8x = 24 x = -3

8x-2x+4x=10x

53

X2 + 8x + 16 = 10x +16x2 + 8x + 16=2x + 8x + 16=10x + 16

x=3

It is 4x^2 + 10x - 1

(2x + 5)(4x2 - 10x + 25)

The given expression can be simplified to: 10x -5

10x. 'coz x=? so just add 2 & 8.

No, it has factors... 4x2 + 8x -21 = (2x+7)(2x-3)

√(10x) * √(8x) = √(80x²)√(80x²) = √(16x²) * √(5) = 4x*√(5)■

y=-10x-4

10x-2x =8x-527

10x - 5y + 2x - 3y = 12x - 8y

6-3x = 5x-10x+2 4 = 8x-10x 4 = -2x x = -2

8x + 6 = 10x - 4Add 4 to each side of the equation:8x + 10 = 10xSubtract 8x from each side:10 = 2xDivide each side by 2:5 = x

12

8x - 9 = 11x + 12 8x = 11x + 21 -3x = 21 x = -7

If: 8x-4 = 3x+21 Then: 8x-3x = 21+4 => 5x = 25 => x = 25/5 Therefore: x = 5

2x+8x-2=22 10x-2=22 10x+2=+2 10x=24 10/10=24/10 x=2.4

If: 21 is a plus Then : x = 20

8X + (2X - 6) = 34 8X + 2X = 34 + 6 10X = 40 X = 10

It is equivalent to: 32x^2 +88x +21

In order.6X + 4X = 10X10X - 2X = 8X8X + (1)X = 9X9X-------final answer