In good weather, tomato seeds can grow into plants and bear ripe fruit in as few as 19 weeks. Lorna planted her seeds 11 weeks ago. How long must she wait before her tomatoes are ready to be picked?
Monimeghala Subbramaniamにより
1. write the equation
1.1. x + 11 = 19
1.1.1. x+11-11 = 19- 11
1.1.1.1. x = 8
2. x REPERESENT UNKNOWN WEEKS
3. INTERPRET VARIABLE
3.1. write a sentence
3.1.1. 11 weeks add x weeks will equal to 19 weeks
3.1.1.1. to get x by itself , subtract 11 from both side of equal sign
3.1.1.1.1. Use commutative property of addition