Question

9.3^x=7^y+4 find x where y= -4

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Answer 1

Answer:

x = -2.

Step-by-step explanation:

Given y = -4

9.3ˣ=7^y+4

=> 3ˣ⁺²  = 7⁻⁴⁺⁴  = 7⁰ = 1

= 3ˣ⁺² = 3⁰

When bases are same, powers are equal.

=> x + 2 = 0

=> x = -2