Solve the equations:
a) 9x+5=4x+30
b) 3(n+2)=21
c)2m-10=7m-15+5
- (a)
- 9x+5=4x+30
- 9x - 4x = 30 - 5
- 5x = 25
- x = 25/5 = 5
- Hence the value of x is 5.
- (b)
- 3(n+2) = 21
- 3 * n + 3 * 2 = 21
- 3n + 6 = 21
- 3n = 21 - 6
- 3n = 15
- n = 15/3
- n = 5
- Hence the value of n is 5.
- (c).
- 2m - 10 = 7m - 15 +5
- 2m - 7m = -10 + 10
- -5m = 0
- m = 0