You can
put this solution on YOUR website!1. Let smallest number be x. So next one is x+2, then x+4 and largest is x+6
x+6 = 2(x) - 14
x+6 = 2x - 14
6 = x - 14
20 = x
so numbers are 20, 22, 24, 26
2. Let smallest angle = a
next angle is a+1
largest is a+2
All 3 add to 180 degrees, so (a+a+1+a+2) = 180
3a+3 = 180
3a = 177
a = 177/3
a = 59
so 3 angles are 59, 60 and 61 degrees
3. Let 2 numbers be x and y, with x being the larger.
x+y = 18
3x - 4y = 5
You solve this simultaneous equation.
jon.