September 2018 2 30 Report
Sederhanakanlah

a. 5a - 2b + 3a
b. 2x + x + 3y - 3y
c. 2c - (c - d)
d. 5c - (c - d)
e. 12 - (1 - x)

caranya bagaimana ya?
mianhe

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