3 years ago

I need some help please

Mathematics

2 answers:

AleksandrR [38]3 years ago

7 0

Answer:

a)-10 b)7

Step-by-step explanation:

a)2 ( x + 3 ) = x - 4

2x+6=x-4

2x+6-x=-4

x+6=-4

x=-4-6

x=-10

b)4 ( 5 x - 2 ) = 2 ( 9 x + 3 )

20x-8=2(9x+3)

20x-8=18x+6

20x-8-18x=6

2x-8=6

2x=6+8

2x=14

x=14/2

x=7

gizmo_the_mogwai [7]3 years ago

3 0

Answer:

a) -10

b) 7

Step-by-step explanation:

a) $2(x + 3) = x - 4$

$= > 2x + 6 = x - 4$

$= > 2x - x = - 4 - 6$

$= > x = - 10$

b) $4(5x - 2) = 2(9x + 3)$

$= > 20x -8 = 18x + 6$

$= > 20x - 18x = 8 + 6$

$= > 2x = 14$

$= > x = \frac{14}{2} = 7$

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