Math 7 Substitution Practice

If ( a = 5 ) and ( b = 2 ), find the value of ( 3a - b ).

If ( x = 7 ) and ( y = 3 ), find the value of ( 4x + 2y ).

If ( m = 6 ) and ( n = 1 ), find the value of ( 5m - 3n ).

• 33

• 27

• 13

• -13

If ( p = 4 ) and ( q = 9 ), find the value of ( 2p + q ).

If ( x = 8 ) and ( y = 5 ), find the value of ( x²- y ).

If ( a = -3 ) and ( b = 7 ), find the value of ( 2a + 4b ).

• 26

• -2

• 34

• 22

If ( m = 2 ) and ( n = 8 ), find the value of ( 3m + 5n ).

If ( p = 9 ) and ( q = 6 ), find the value of ( p - 2q ).

If ( x = 5 ) and ( y = 2 ), find the value of ( 3x² + y ).

If ( a = 4 ) and ( b = 3 ), find the value of ( 2a²-b).