400 – x = 275 + 25
– x = 25 + 275 – 400
-x = -100
x = 100
400 – x = 275 + 25 – x = 25 + 275 – 400 -x = -100 x = 100
400 – x = 275 + 25
– x = 25 + 275 – 400
-x = -100
x = 100
400 – x = 275 + 25 – x = 25 + 275 – 400 -x = -100 x = 100