Solve the simultaneous linear equations: x + 2y = 16: 3x - 4y = -12.
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4y = -3x + 7 [2] y = -3x/4 + 7/4
4y = -3x + 7 [2] y = -3x/4 + 7/4 // Plug this in for variable y in equation [1]
4y = -3x + 7 [2] y = -3x/4 + 7/4 // Plug this in for variable y in equation [1] [1] 5x - 2•(-3x/4+7/4) = 16 [1] 13x/2 = 39/2 [1] 13x = 39
4y = -3x + 7 [2] y = -3x/4 + 7/4 // Plug this in for variable y in equation [1] [1] 5x - 2•(-3x/4+7/4) = 16 [1] 13x/2 = 39/2 [1] 13x = 39 // Solve equation [1] for the variable x
4y = -3x + 7 [2] y = -3x/4 + 7/4 // Plug this in for variable y in equation [1] [1] 5x - 2•(-3x/4+7/4) = 16 [1] 13x/2 = 39/2 [1] 13x = 39 // Solve equation [1] for the variable x [1] 13x = 39 [1] x = 3
4y = -3x + 7 [2] y = -3x/4 + 7/4 // Plug this in for variable y in equation [1] [1] 5x - 2•(-3x/4+7/4) = 16 [1] 13x/2 = 39/2 [1] 13x = 39 // Solve equation [1] for the variable x [1] 13x = 39 [1] x = 3 // By now we know this much :
4y = -3x + 7 [2] y = -3x/4 + 7/4 // Plug this in for variable y in equation [1] [1] 5x - 2•(-3x/4+7/4) = 16 [1] 13x/2 = 39/2 [1] 13x = 39 // Solve equation [1] for the variable x [1] 13x = 39 [1] x = 3 // By now we know this much : x = 3 y = -3x/4+7/4
4y = -3x + 7 [2] y = -3x/4 + 7/4 // Plug this in for variable y in equation [1] [1] 5x - 2•(-3x/4+7/4) = 16 [1] 13x/2 = 39/2 [1] 13x = 39 // Solve equation [1] for the variable x [1] 13x = 39 [1] x = 3 // By now we know this much : x = 3 y = -3x/4+7/4// Use the x value to solve for y
4y = -3x + 7 [2] y = -3x/4 + 7/4 // Plug this in for variable y in equation [1] [1] 5x - 2•(-3x/4+7/4) = 16 [1] 13x/2 = 39/2 [1] 13x = 39 // Solve equation [1] for the variable x [1] 13x = 39 [1] x = 3 // By now we know this much : x = 3 y = -3x/4+7/4// Use the x value to solve for y y = -(3/4)(3)+7/4 = -1/2
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