Question

10×+10 = 5(×+2)
4(×+5)=2×+34
10(×+2)=8×+22
5(×+4)=3(×+10)-8
×+19=2(×+6)
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Answer 1

10x + 10 = 5 (x + 2)

$10x + 10 = 5x + 10$

$10x = 5x$

$2x = x$

$2x - x = 0$

$x = 0$

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4 (x + 5) = 2x + 34

$4x + 20 = 2x + 34$

$4x = 2x + 34 - 20$

$4x = 2x + 14$

$4x - 2x = 14$

$2x = 14$

$x = \frac{14}{2}$

$x = 7$

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10 (x + 2) = 8x + 22

$10x + 20 = 8x + 22$

$10x = 8x + 22 - 20$

$10x = 8x + 2$

$10x - 8x = 2$

$2x = 2$

$x = 1$

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5 (x + 4) = 3 (x + 10) -8

$5x + 20 = 3x + 30 - 8$

$5x + 20 = 3x + 22$

$5x = 3x + 22 - 20$

$5x = 3x + 2$

$5x - 3x = 2$

$2x = 2$

$x = 1$

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x + 19 = 2 (x + 6)

$x + 19 = 2x + 12$

$19 = 2x + 12 - x$

$19 = x + 12$

$19 - 12 = x$

$7 = x$

$x = 7$

ATTE: OrekiHoutarou