3n - 24 = 14 - 30n33n = 38n = 38/33
-96 = 33-y -96-33 = -y -129 = -y y = 129 Remember a minus divided into a minus is equal to a plus.
3x + 9 = 42 3x = 33 x = 11
x + 7y = 33 (1) --> x = 33 - 7y (1a) 3x - 2y = 7 (2) To solve the simultaneous equations, starts by substituting the value for x found in (1a) into (2): 3(33 - 7y) - 2y = 7 99 - 21y - 2y = 7 -23y = -92 y = 4 Now substitute this value for y into (1a) and solve for x: x = 33 - 7(4) x = 33 - 28 x = 5 Therefore these equations have the solution x = 5, y = 4
47
14c+33-10c=5 4c+33=5 4c=-28 c=-7
825
x + 2x = 33 3x = 33 3x/3 = 33/3 x = 11
p - 33 = 17 Add '33' to both sides Hence p - 33 + 33 = 17 + 33 p = 50
3n - 24 = 14 - 30n33n = 38n = 38/33
-96 = 33-y -96-33 = -y -129 = -y y = 129 Remember a minus divided into a minus is equal to a plus.
33
33
154g = 5.432oz
It works out that x = 6 and y = 3 or as (6, 3)
3x + 9 = 42 3x = 33 x = 11
11 x 2= 22 x+x=2 22 divided by 2= 11 22+11= 33 33-5=28