Work out the value of x when
X – 20 : x + 280
simplifies to
1:4
2 answers:
Answer:
Solution for your question is X=120
Answer:
x = 120
Step-by-step explanation:
Express the ratios as equivalent fractions, that is
= 
( cross- multiply )
4(x - 20) = x + 280
4x - 80 = x + 280 ( subtract x from both sides )
3x - 80 = 280 ( add 80 to both sides )
3x = 360 ( divide both sides by 3 )
x = 120
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