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These resources are designed to help you familiarize yourself with the exam format, identify key topics, and practice effectively. Whether you're preparing for the May/June or GCE sessions, our curated materials provide both objective and theory questions to enhance your study sessions.","tags","waec nigeria west africa examination council","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",10,"createdOn",1755991949910,"updatedOn","questionsCount",27220,"courseCount",23,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":426},"8tVNmDtSVzcF9MEWbFi3lJsB2rpGKG","q","If x + y = 12 and 3x - y = 20, find the value of 2x - y","ans",[414],2,"2006","course","mathematics","exp","x + y = 12
\n+ 3x - y = 20
\n---------------
\n 4x = 32
\n
\nx = 8
\n
\nx + y = 12; 8 + y = 12; y = 12 - 8
\n
\n= 4
\n
\n2x - y = 2(8) - 4; 16 - 4 = 12","opts",[422,423,424,425],"8","10","12","15",20,"20","initComment","initReply","actionData","errors"]

WAEC - Mathematics (2006 - No. 20)

Explanation

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