How to calculate 2x plus 9 = 4x plus 2 (by equation) 2X + 9 = 4x + 2 equation

How to calculate 2x plus 9 = 4x plus 2 (by equation) 2X + 9 = 4x + 2 equation

2x+9=4x+2
4x-2x=9-2
2x=7
x=7/2

The inequality is solved and its solution set is expressed on the number axis. 7 (4-x) - 2 (4-3x) < 4x

From the original inequality, we can get 20-x < 4x, transfer and merge the similar terms, we can get - 5x < - 20, divide both sides of the inequality by - 5 (the direction of the unequal sign changes), we can get x > 4

How to solve 0.3x × 7 + 4x = 37.21

2.1x+4x=37.21
6.1x=37.21
x=37.21÷6.1
x=6.1