3x+7x+10=90 3(x-12)+23=357x-8=2x+27 5x-18=3–2x
9-3= 9-5= 18-2=11-1= 9-6= 9-1=
19-4= 19-6= 16-5=16-4= 16-0= 16-2=
7+2= 2+5= 12+5=11+1= 7+3= 12+1=
5+2= 5+4= 15+1=11+5= 5+5= 12+3=
12+4= 12+7= 11+4=12+3= 16+2= 11+6=