x^+x+3 There are three questions, and I need not only the answers but also the process

x^+x+3 There are three questions, and I need not only the answers but also the process

This topic is very simple
Use the root formula to work out two solutions first, and then draw a picture to judge
Let me give you an example, such as the third one, which can be reduced to (x + 1) (X-2) ≤ 0, and its opening is upward
So the answer is - 1 ≤ x ≤ 2
The other two can also do so. Do not understand can also ask oh~

Solving linear equation with one variable
1 / 2x-6 = 3 / 4x 1 / 2b-2 / 3B + B = 2 / 3 times 6-1
16y-2.5y-7.5y = 5 3x + 5 = 4x + 1 9-3y = 5Y + 5 note: what / what is a fraction. For example: 1 / 2 = half

1/2x-6=3/4x   , 1/2X4x-6X4=3/4X4x, 2x-24=3x, x=241/2b-2/3b+b=2/3X6-1=3, 3b+2b=18, b=18/5 ,16y-2.5y-7.5y=5, 16y-10y=5, 6y=5, y=5/63x+5=4x+1, 5-1=4x-3x, x=4 9-3y=5y+5, 9-5=5y+3y, 8y=4, y=1/2