- Aan '=' sign
- Ba '>' sign
- Ca '+' sign
- Da variable
Step-by-Step Solution
An equation is a statement that two expressions are equal, so it must have an equals (=) sign. A '>' makes it an inequality, not an equation.
Answer: A) an '=' sign
Which symbol must every equation contain?
Class 7Simple EquationsSimple Equations
Key idea: The balance principle
An equation is like a balance scale: LHS on one pan, RHS on the other, and the scale is level. Whatever you do to one side, you must do to the other to keep it balanced. So if you add 5 to LHS, add 5 to RHS. If you divide LHS by 3, divide RHS by 3.
Goal: isolate the variable on one side. Get by itself by undoing every operation around it, in reverse order, applied to BOTH sides.
Goal: isolate the variable on one side. Get by itself by undoing every operation around it, in reverse order, applied to BOTH sides.
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More Class 7 Simple Equations practice
In the equation 4x + 7 = 23, the LHS (Left-Hand Side) is:To undo the operation '× 6' on a variable, which inverse operation do you apply to both…When a term is transposed (moved) across the '=' sign, what happens to it?Is x = 4 a solution of the equation 2x + 3 = 11?Write the equation for the statement: 'Twice a number p, increased by 5, equals 17.'