hasil oprasi bilangan 124+40×a-345=649 nilai a adalah .....
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[tex]124 + 40 \times a - 345 = 649[/tex]
[tex]124 - 345 + 40 \times a = 649[/tex]
[tex]( - 221) + 40 \times a = 649[/tex]
[tex]40 \times a = 649 - ( - 221)[/tex]
[tex]40 \times a = 649 + 221[/tex]
[tex]40 \times a = 870[/tex]
[tex]a = \frac{870}{40} = \frac{87}{4}[/tex]
Jawaban
21,75
Penyelesaian
124 + 40 x a - 345 = 649
-221 + 40 x a = 649
40 x a = 649 + 221
40a = 870
a = 870 : 40
a = 21,75
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