y += x means the value y+x is first calculated, and the resulting value is then assigned to y. It is equivalent to y = y+x
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y' = (sec(x))^2
x = y = 0 ?
Can you help with this equation? Thanks. Solve for x and y and z for the following. x plus y plus z equals 9 x plus 2y plus 3z equals 23 x plus 5y plus -3z equals -7
y equals x plus 5 is the equation of a straight line in the x-y plane.