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enyata [817]
3 years ago
10

21<2x+3 help fast please ​

Chemistry
2 answers:
kolezko [41]3 years ago
7 0

Answer:

Explanation:

x in (-oo:+oo)

2 < (1/2)*x-3 // - (1/2)*x-3

2-((1/2)*x)+3 < 0

(-1/2)*x+2+3 < 0

5-1/2*x < 0 // - 5

-1/2*x < -5 // : -1/2

x > -5/(-1/2)

x > 10

x in (10:+oo)

(10:+oo)

ValentinkaMS [17]3 years ago
5 0

Answer:

x > 9

Explanation:

21 < 2x + 3

Subtract 3 from both side

21 —3 < 2x + 3 —3

18 < 2x

Divide both side by the coefficient of x i.e 2

18/2 < x

9 < x

Since 9 is less than x, it therefore means that x is grater that 9.

x > 9

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