Subtract from Sides

**What**: Subtract the same expression from the both sides of == **Why**: Such side-wise subtraction is an essential computation for solving equations **Time To Complete**: 3 hours

eq = (x -3 == 17*y + 9);

lhs = eq.left - 9; 
rhs = eq.right - 9;

eq2 = (lhs == rhs);

show eq2;

save as sides;

Output

"eq2" → -12 + x == 17*y