Soal :4/5 + 7/4 =180x – 20x + 30x =
Jawaban:
4/5 + 7/4
16/20 + 35/20
(16+35)/20
51/20
= 2 11/20
180x – 20x + 30x
(180-20)x + 30x
160x + 30x
(160+30)x
= 190x
4/5 + 7/4
= (4 × 4)/(5 × 4) + (7 × 5)/(4 × 5)
= 16/20 + 35/20
= 16 + 35/20
= 51/20
= 4 11/20
_____
180x – 20x + 30x
= (180 – 20 + 30)x
= (160 + 30)x
= 190x
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