Knowledge and Understanding

Explain why the solution to 2/5 x +3=1/2 is equivalent to the solution of 4x + 30 = 5

equation 1             equation 2
2/5 = 0.4                4
+3                          +30
1/2=0.5                  =5



equation 2 is equivalent to equation 1 because all the numbers for equation 2 are up one place value
the answer will always be the same throughout place values

x= -6.25

40x + 300 = 50 is equivalent to the other equations