3x+8=15 find try the value of x

3x+8=15

move +8 to the other side

sign changes from +8 to -8

3x+8-8= 15-8

3x= 15-8

3x= 7

divide both sides by 3 to get x by itself

3x/3= 7/3

7/3 or 2 1/3

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

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