Question

Find the value of x: (-2)x+1 × (-2)3 = (-2)7

Answer 1

Answer:

(-2)x+1 × (-2)3 = (-2)7

= (-2x)+1×(-6)= (-14)

= (-2x)+(-6)=(-14)

= (-2x) = (-14+6)

= (-2x) = (-8)

= (-x) = 8/2

= (-x) = 4

= x=(-4)

Answer 2

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(-2)x+1 × (-2)3 = (-2)7

-2×x+1 × (-2)×3=(-2)×7

-2x+1 × (-6)= -14

-2x+(-6)= -14

-2x-6= -14

-2x= -14+6

-2x= -8

$\big \tt \: x = \frac{ \cancel- 8}{ \cancel - 2} = 4$

So value of x=4

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