Question

X+1<

21



_


4 or the fractions 21 4

Answer 1

`\large\boxed{x<4(1)/(4)\to x\in\left(-\infty,\ 4(1)/(4)\right)}`

Explanation:

`x+1<(21)/(4)\\\\x+1<(20+1)/(4)\\\\x+1<(20)/(4)+(1)/(4)\\\\x+1<5(1)/(4)\qquad\text{subtract 1 from both sides}\\\\x+1-1<5(1)/(4)-1\\\\x<4(1)/(4)`