Answer:
Equation 3. has no solution.
Step-by-step explanation:
1. 4(x + 3) + 2x = 6(x + 2)
4x+12+2x=6x +12,
6x+12=6x+12 There are infinitely solutions
2. 5+2(3 + 2x) = x + 3(x + 1)
5+6+4x=x+3x +3
11+4x=4x+3
11=3 (no solution)
3. 5(x + 3) + x = 4(x + 3) + 3
5x+15+x=4x+12+3
6x+15=4x+15
6x-4x=15-15
2x=0 x=0
4. 4 + 6(2 + x) = 2(3x + 8)
4+12+6x=6x+16
16+6x=6x+16 There are infinitely solutions.
