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A workman is paid Rs.150 for each days he works and is fined Rs.50 for each day he
is absent. In the month of 30 days he earned Rs.2100. For many days did he remain absent?
Mathematics
Equations
What is the value of the expression \[2{x^2} + 3xy - 4{y^2}\] when \[x = 2\& y = - 4\] ?
Mathematics
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How do you solve $\sqrt {2x - 1} = x - 2$?

Mathematics
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How do you solve the simultaneous equations $2x + 3y = - 3$ and $3x - 2y = 28?$
Mathematics
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How do you simplify $3x + 2y + 4y?$
Mathematics
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How do you solve and check your solutions to $ 3.2 + \dfrac{x}{{2.5}} = 4.6 $ ?
Mathematics
Equations
If $r$ varies jointly as $p$ and $q$ and inversely as $t$, then how do you find an equation for r if $r=6$ when $p=8,q=-3$ and $t=3$ ?
Mathematics
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How do you solve $2(2x - 5) = 6x + 5$ ?
Mathematics
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How do you write $21{x^2} + 5x - 35 = 3{x^2} - 4x$in standard form?
Mathematics
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How do you write $ 2{x^2} - 3 = - 6x - 2 $ in standard form?
Mathematics
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How do you solve $6(5 - 8v) + 12 = - 54?$
Mathematics
Equations
How do you solve \[ - 70 - 8x = 38 - 4x\]?
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