Question

solve the folowing equasions for x

1. 8x + 4.5=2x-12
2. 12-x=5+7(x-2)

Answer 1

Answer:

1. 8x + 4.5 = 2x - 12

or, 8x - 2x = -12 - 4.5

or, 6x = -16.5

or, x = -16.5/6 = -2.75

2. 12 - x = 5 + 7(x-2)

or, 12 - x = 5 + 7x - 14 = -9 + 7x

or, 12 + 9 = 7x + x

or, 21 = 8x

or, x = 21/8 = 2.62500

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Answer 2

Answer:

1. 1.25

2. 2.625

Step-by-step explanation:

1. 8x + 4.5=2x-12

1. 8x + 4.5=2x-12 =⟩ 8x - 2x =12-4.5

1. 8x + 4.5=2x-12 =⟩ 8x - 2x =12-4.5 =⟩ 6x = 7.5

1. 8x + 4.5=2x-12 =⟩ 8x - 2x =12-4.5 =⟩ 6x = 7.5 =⟩ x = 7.5/6

1. 8x + 4.5=2x-12 =⟩ 8x - 2x =12-4.5 =⟩ 6x = 7.5 =⟩ x = 7.5/6 =⟩ x = 1.25

2. 12 - x = 5 + 7(x - 2)

2) =⟩ 12 - x = 5 + 7x - 14

=⟩ 12 - 5 + 14 = 7x + x

=⟩ 26 - 5 = 8x

=⟩ 21 = 8x

=⟩ 8x = 21

=⟩ x = 21/8

=⟩ x = 2.625