Question

a)-13-15=3×-7× b)-4×-5=-11-2.(×-6)
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Answer 1

a)

$- 13 - 15 = 3x - 7x$

$- 28 = - 4x$

$- 28 \div ( - 4) = x$

$7 = x$

b)

$- 4x - 5 = - 11 - 2(x - 6)$

$- 4x - 5 = - 11 - 2x + 12$

$- 4x + 2x = - 11 + 12 + 5$

$- 2x = 6$

$x = 6 \div ( - 2)$

$x = - 3$

Answer 2

Respuesta:

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A)

$\bf - 13 - 15 = 3x - 7$

$\bf - 28 = 3x - 7$

$\bf - 3x = - 7 + 28$

$\bf - 3x = 21$

$\boxed{ \bf \: x = - 7}$

B)

$\bf - 4x - 5 = - 11 - 2 \times (x - 6)$

$\bf - 4x - 5 = - 11 - 2x + 12$

$\bf - 4x - 5 = 1 - 2x$

$\bf - 4x + 2x = 1 + 5$

$\bf - 2x = 6$

$\boxed{ \bf \: x = - 3}$

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