There are an infinite number of them ... all of the points
on the line represented by the equation.
Here are four of them:
x=0, y= -5
x=1, y= -6
x=5, y= -10
x= -792, y= 787
Minus five, plus one, equals minus four.
4' four
Four minus two and three-eighths equals one and five-eighths.
1*-7 +7-4=-4
7
3
No. It is only true for one value of x so it is an equation. An identity must be true for all values of x. An identity equation is like saying "in other words ... ".
Minus five, plus one, equals minus four.
4' four
83
Four minus two and three-eighths equals one and five-eighths.
1*-7 +7-4=-4
Two negatives make a positive so your equation simplifies firstly as 4ab + 3ab and finally as 7ab.
Negative 5.
7
Four minus three equals one. (Or, 4 - 3 = 1.)
You have x+4=25 so you minus the four from four and you minus the four from the 25 . and then you get 21 so it is x=21