Question

Solve this easy maths question:

✓ Best Answer (with steps) gets brainliest

Find x :

$2 ^{x + 2} + 4.2 ^{2x - 1} = 10$

Answer 1

2^x+2 +4.2 ^2x-1 = 10
2^x + 4 + 4.2^x + 4.2 = 10
6.2^x + 8.2 =10
6.2^x = 10-8.2
6.2^x = 1.8
6.2 = x root 1.8
6.2×x = x root 1.8 × x ( multiplying both side with x)
6.2x = 1.8
x = 1.8/6.2
x = 0.9/3.1