Tìm x:
a) x + 2 = 8...................
x × 2 = 8..................
b) x + 3 = 12................
x × 3 = 12................
c) 3 + x = 27.................
3 × x = 27................
a)
● x + 2 = 8
x = 8 − 2
x = 6
● x × 2 = 8
x = 8 : 2
x = 4
b)
● x + 3 = 12
x = 12 − 3
x = 9
● x × 3 = 12
x = 12 : 3
x = 4
c)
● 3 + x = 27
x = 27 − 3
x = 24
● 3 × x = 27
x = 27 : 3
x = 9
-- Mod Toán 2
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