Question

13p–18p–6=15p+6(3p–20)
p=

Answer 1

13p − 18p − 6 = 15p + 6(3p − 20)

Left: −5p − 6. Right: 15p + 18p − 120 = 33p − 120.

So −5p − 6 = 33p − 120
⇒ −38p = −114
⇒ p = 3.

Check: LHS = 13·3 − 18·3 − 6 = −21, RHS = 15·3 + 6(9 − 20) = −21. ✅