y = 4/5 or 0.8
Replace the y with a 3. 16 x 3 + 9 = 57
x + 8y = 3 therefore 2x + 16y = 6 (a) 2x + 3y = -7 (b) Subtract (b) from (a): 13y = 13 so y = 1 and x = -5
-3x+16y = 28 3(x-3y = 7) Multiply the bottom equation by 3 then add both equations together in order to eliminate x: 7y = 49 y = 7 Substitute the value of y into the original to find the value of x: So: x = 28 and y = 7
No.
42
67 plus 3 equals 70.
3 plus 1 plus 4 equals 8
Yes, -8 plus plus 3 equals -5. The "plus plus" is equivalent to a positive sign, so -8 plus (+3) equals -5.
12
89
2.5 plus 6 plus 3 equals 2.5 plus 6 plus 3
4 plus 3 equals 7