EXERCISE 12.2Simplify combining like terms:21b-32 + 7b-205m - -+13= - 53+72 - 152(p-p-9-9-(-p)() 3a - 2b-ab-(a - b + ab) + 3ab + b -a(1) Sry – Sr +3 – 31 trg +8p* – 375(11) 35 + 5y – 4) - (81 – 7 – 4).2 Add:03mm, - 5mn, 8mm, - 4mm(i) 1 - 8tz, 3tz - 2, 2-1(i) - 7mn +5, 12mn + 2, 9mn-8. - 2m - 3(iv) a+b.-3, b-a +3, a-b+3(v) 14x + 10y - 12xy - 13, 18 - 7x - 10y + 8xy, 4xy(vi) 5m - 7n, 3n - 4m + 2, 2m - 3mn - 5(vii) 4xły, - 3xy?, -5xy?, 5x+y

EXERCISE 12.2Simplify combining like terms:21b-32 + 7b-205m - -+13= -

1.	EXERCISE 12.2Simplify combining like terms:21b-32 + 7b-205m - -+13= - 53+72 - 152(p-p-9-9-(-p)() 3a - 2b-ab-(a - b + ab) + 3ab + b -a(1) Sry – Sr +3 – 31 trg +8p* – 375(11) 35 + 5y – 4) - (81 – 7 – 4).2 Add:03mm, - 5mn, 8mm, - 4mm(i) 1 - 8tz, 3tz - 2, 2-1(i) - 7mn +5, 12mn + 2, 9mn-8. - 2m - 3(iv) a+b.-3, b-a +3, a-b+3(v) 14x + 10y - 12xy - 13, 18 - 7x - 10y + 8xy, 4xy(vi) 5m - 7n, 3n - 4m + 2, 2m - 3mn - 5(vii) 4xły, - 3xy?, -5xy?, 5x+y
Answer» a) 21b-32+7b-20b==21b-32-13b=8b=32, b=32/8=4, (ii)-z^2+13z^2-5z+7z^2-15z= 20z^2-z^2-20z=19z^2-20z; 19z^2=20z;, 19z^2/z=20 ; 19z=20; z=20-19=1;