Soal :4/5 + 7/4 =180x – 20x + 30x =​

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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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