Subtract from Sides

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