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Secondary 1 | Maths
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Date Posted: 4 years ago
Views: 228
(c)
3x/4 + 0.2 (x - 3) = 0.15x - 2/5
X 4
3x + 0.8 (x - 3) = 0.6x - 8/5
X 5
15x + 4 (x - 3) = 3x - 8
=> 15x + 4 x - 12 = 3x - 8
=> 15x + 4 x - 3x = 12 - 8
=> 16x = -4
=> x = -1/4
.
3x/4 + 0.2 (x - 3) = 0.15x - 2/5
X 4
3x + 0.8 (x - 3) = 0.6x - 8/5
X 5
15x + 4 (x - 3) = 3x - 8
=> 15x + 4 x - 12 = 3x - 8
=> 15x + 4 x - 3x = 12 - 8
=> 16x = -4
=> x = -1/4
.
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done
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Apply this to all the examples, becareful of the minus signs. Minus minus becomes positive.
Date Posted:
4 years ago
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