Answers edited by Aswin K.

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• How do you simplify #\frac { 15} { 4x ^ { 2} } \times \frac { 28x } { 45}#?
  
• How do you solve #\frac { 7} { 10} + \frac { 8} { 10}#?
  
• How do you solve #8/11 - 2/5#?
  
• How do you solve #7(6-3k)=147#?
  
• How do you evaluate #12\frac { 1} { 4} \div 3\frac { 1} { 2} #?