Question

find x, 21 + 3x > 12

Answer 1

Answer:

more than 1

Step-by-step explanation:

because when we substitute the values from 1,2,3,4,5,6........ we get more than the values of 12 which wholes good the equation

Answer 2

Answer:

$2 1 + 3 x > 1 2 \quad : \quad \begin{bmatrix}\mathrm{ S o l u t i o n : } \: & \: x > - 3 \: \\ \:\mathrm{ I n t e r v a l \: N o t a t i o n : } & \: \left( - 3 , \: \infty \: \right) \end {bmatrix}$

Step-by-step explanation:

$2 1 + 3 x > 1 2$

$\gray{\mathrm{ S u b t r a c t \: } 2 1 \mathrm{ \: f r o m \: b o t h \: s i d e s }}$

$2 1 + 3 x - 2 1 > 1 2 - 2 1$

$\gray{\mathrm{ S i m p l i f y }}$

$3 x > - 9$

$\gray{\mathrm{ D i v i d e \: b o t h \: s i d e s \: b y \: } 3 }$

$\dfrac{ 3 x }{ 3 } > \dfrac{ - 9 }{ 3 }$

$\gray{\mathrm{ S i m p l i f y }}$

$x > - 3$