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Khan Academy (English - US curriculum)
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Khan Academy (English - US curriculum)
Math
Pre-algebra
Systems of equations
Solving systems with substitution
Solving systems with substitution
Systems of equations with substitution: 2y=x+7 & x=y-4
Systems of equations with substitution: y=4x-17.5 & y+2x=6.5
Systems of equations with substitution: -3x-4y=-2 & y=2x-5
Systems of equations with substitution: 9x+3y=15 & y-x=5
Systems of equations with substitution
Systems of equations with substitution: y=-5x+8 & 10x+2y=-2
Systems of equations with substitution: y=-1/4x+100 & y=-1/4x+120
