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Solving an equation means finding the value or values for which the two ✌️ exp...

Let the no. be z A/Q 2z +21 = 9z +7 Shifting Numbers on one side and algebraic...

erinsheep425

What is the difference between equationand identity ?

Twice a number (z)added to 21 is equal to 9 times the number added to 7. What is the number?
A.&nbsp; z = -4
B.&nbsp; z = -2
C.&nbsp; z = 2
D.&nbsp; z = 4
&nbsp;

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