Solution equation: 5x-2.2x = 5 × 3-1.2x

Solution equation: 5x-2.2x = 5 × 3-1.2x


5x—2.2x=5×3—1.2x
2.8x+1.2x=15
4x=15
x=15÷4
x=3.75



How much is 4.2x + 2.5x = 13.4


4.2x+2.5x=13.4
6.7x=13.4
x=13.4/6.7
x=2



2X & # 178; * 5x + 3 greater than or equal to 0


2X ^ 2 + 5x + 3 > = 0, using the cross decomposition method: (2x + 3) (x + 1) > = 0, so x > = - 1 and X



3 - (2x-1) greater than or equal to 5x + 4 2 / 2 x-3 less than 2


3-(2x-1)≥5x+4
3-2x+1≥5x+4
5x+2x≤3+1-4
7x≤0
x≤0
2 x-3