system of equations
... variable. If one of the equations has a variable term with coefficient 1 or –1, choose that equation since the substitution method is usually easier this way. Step 2 Substitute for that variable in the other equation. The result should be an equation with just one variable. Step 3 Solve the equation ...
... variable. If one of the equations has a variable term with coefficient 1 or –1, choose that equation since the substitution method is usually easier this way. Step 2 Substitute for that variable in the other equation. The result should be an equation with just one variable. Step 3 Solve the equation ...
Beginning & Intermediate Algebra. 4ed
... Like Terms Like terms contain the same variables raised to the same powers. ...
... Like Terms Like terms contain the same variables raised to the same powers. ...
one
... even, therefore x must be even too. However, if x is an even number (divisible by two), then its square must be divisible by 22 = 4, hence (z2 + 7) must be divisible by 2 i.e. (z2 + 7) is even. Then we can deduce that z2 must be an odd number, from which it follows that z is an odd number. Now rearr ...
... even, therefore x must be even too. However, if x is an even number (divisible by two), then its square must be divisible by 22 = 4, hence (z2 + 7) must be divisible by 2 i.e. (z2 + 7) is even. Then we can deduce that z2 must be an odd number, from which it follows that z is an odd number. Now rearr ...
