1.
So remember that with more than one pair of parentheses, you have to start from the inside and make your way outside.
Firstly, on the left side, solve 5+2 and on the right side solve 4 × 3:
[tex]4[3(7)]=95-12[/tex]
Next, on the left side, solve 3 × 7 and on the right side solve the subtraction:
[tex]4[21]=83[/tex]
Lastly, solve the remaining multiplication on the left side and the answer is [tex]84= 83[/tex]
Since 84 is not equal to 83, the correct answer is the second option.
2.
For this, plug 5 into the z variable to solve.
[tex]3*5=2*5+5\\15=10+5\\15=15[/tex]
Since 15 = 15 is true, your answer is the first option.
3.
So for this, it's a similar process as Question 2 except that you are plugging in 0 into the x variable to solve:
[tex]8-4*0=4*0\\8-0=0\\8=0[/tex]
Since 8 = 0 is a false statement, the correct answer is the second option.
