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3 la puterea x+3 *4 la puterea x+1 - 5 * 3 la puterea x * 4 la puterea x=1236

Răspuns :

3ˣ⁺³ *4ˣ⁺¹- 5 * 3ˣ * 4ˣ=1236
3ˣ *4ˣ(
3³ *4¹- 5*1)=1236
12ˣ×(108- 5)=1236
12ˣ ×103=1236
12ˣ =12¹
x=1