a)
235+X=347.59
X=347.59-235
X=112.59
b)
X+25.17=32.15
X=32.15-25.17
X=6.98
c)
X-176=121.36
X=121.36+176
X=297.36
d)
101.57-X=14.07
X=101.57-14.07
X=87.50