Answer:
Addition:
x+1=4
50+x=66
9+8+x+15=32
6+3+x=45
k+5=25
Subtraction:
x-1=4
50-x=66
9-8-x-55= -32
6-3-x=45
k-5= -25
x+3=9, k+22=29, x+5=7, x+7=10, x+6=11
y-5=8, p-18=3, 12-x=1, x-4=1, x-5=8
Explanation:
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