Answer:
a) 6
b) 1/3
c) 2
Step-by-step explanation:
a) 3 ( x + 1 ) - x = 15. expand the bracket
3x + 3 - x = 15
2x + 3 = 15. collect the like terms
2x = 15 - 3.
2x = 12.
x = 12/2 = 6
b) 5 ( x + 2 ) - 2x = 11. expand the bracket
5x + 10 - 2x = 11
3x + 10 = 11. collect the like terms
3x = 11 - 10
3x = 1
x = 1/3
c) 6 ( 1 - 2x ) = - 4 - 7x. expand the bracket
6 - 12x = -4 -7x. collect the like terms
6 + 4 = -7x + 12x
10 = 5x
or
5x =. 10
x = 10/5 = 2
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