7x = 20 + 4x
Subtract 4x from each side of the equation:
3x = 20
Divide each side by 3 :
x = 20/3
To solve for x, we'd have to know what this expression equals.
y=16 x= -4
-7m + 20 = -17m - 1010m = -30m = -3
3x+5=20 3x=15 x=5
-3x + 5 = 20 -3x = 15 x = -5
(20 - x)/5
20
To solve for x, we'd have to know what this expression equals.
To solve this one, subtract 50 from 180 and you'll have your answer.
y=16 x= -4
-7m + 20 = -17m - 1010m = -30m = -3
68
Better formatting is cos(2x+20)=-0.5
3x+5=20 3x=15 x=5
-3x + 5 = 20 -3x = 15 x = -5
20 = 400
138