simplify and solve the following equation and check your results
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14
Answer 1:
15(y-4)-2(y-9)+5(y+6) = 0
= 15y-60-2y+18+5y+30
= 15y-2y+5y-60+18+30
= 18y-12 = 0
18y = 12
y = 12/18
y = 6/9
Answer 2:
0.25(4f-3) = 0.05(10f-9)
0.25(4f-3) = 0.05(10f-9)= 1f-0. 75 = 0.5f-0.45
Bringing same terms on same side
1f-0.5f = -0.45+0.75
1f-0.5f = -0.45+0.75
0.5f = 0.3
f = 0.3/0.5
f = 3/5
(In above answer the no. should not be -18 but it should be +18 )
Answered by
6
Given Questions:
(i) 15(y-4) - 2(y-9) + 5(y+6) = 0
(ii) 0.25 (4f-3) = 0.05 (10f-9)
Solutions:
(i) 15(y-4) - 2(y-9) + 5(y+6) = 0
15y - 60 - 2y - 18 + 5y + 30 = 0
15y - 2y + 5y = 60 + 18 -30
15y + 5y - 2y = 60 + 18 -30
18y = 48
y = 48/18
y = 2.66
(ii) 0.25 (4f-3) = 0.05 (10f-9)
f - 0.75 = 0.5f - 0.45
f - 0.5f = 0.75 -0.45
0.5f = 0.3
f = 0.3/0.5
f = 3/5
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