pls I needed it
step by step with formula
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Answered by
1
Answer:
812/9
Step-by-step explanation:
2/7(a - 7) - 1/5(a - 3) = 19/3
2a/7 - 2 - a/5 + 3/5 = 19/3
2a/7 - a/5 - 2 + 3/5 = 19/3
10a/35 - 7a/35 - 10/5 + 3/5 = 19/3
3a/35 -7/5 = 19/3
3a/35 = 19/3 + 7/5 = 95/15 + 21/15 = 116/15
a = 116/15 × 35/3 = 812/9
Answered by
1
Answer:
2/7 ( a - 7 ) - 1/5 ( a - 3 ) = 19/ 3
2a/7 - 2 - a/5 + 3/5 =19 / 3
2a/7 - a/5 - 2 + 3/5 =19 /3
(10a - 7a - 70 + 21) / 35 = 19 /3
( 3a - 49 )/35 = 19/3
3a - 49 = 19 × 35 / 3
3a - 49 = 665/3
3a = 665/3 + 49
3a = (665 + 147 )/ 3
3a = 812/ 3
a = 812/ 9
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