document.write( "Question 1154218: 1.3s+1.7f=37.9
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Algebra.Com's Answer #776623 by MathTherapy(10552) $\"\"$ $\"About$

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1.3s+1.7f=37.9
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Correct answers: 
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document.write( "1.3s + 1.7f = 37.9 ------ eq (i)
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document.write( "5.4s + 5.6f = 147.2____2(2.7s + 2.8f) = 2(73.6)_____2.7s + 2.8f = 73.6 ----- eq (ii)\r
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document.write( "In order to avoid too many decimals and very large numbers, you can do the following:
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document.write( "1.4s + 1.1f = 35.7 ----- Subtracting eq (i) from eq (ii) ------ eq (iii) 
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document.write( ".1s - .6f = - 2.2 ------ Subtracting eq (i) from eq (iii)------ eq (iv) 
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document.write( "s - 6f = - 22_____s = 6f - 22 ---- Multiplying eq (iv) by 10 ---- eq (v)
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document.write( "1.3(6f - 22) + 1.7f = 37.9 ------- Substituting 6f - 22 for s in eq (i) 
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document.write( "7.8f - 28.6 + 1.7f = 37.9
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document.write( "9.5f = 66.5
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document.write( "s = 6(7) - 22 ------ Substituting 7 for f in eq (v) 
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document.write( "You can do the check!! \n" );
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