pls answer me urgently please send me urgent
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Step-by-step explanation:
1)7p-8q+11r+13+10p-13q+18+8p-5q-14r+12+5p+17q+14r=30p-21q+11r+43
2)6ax-2by+3cz+16by-11ax-15cz+10cz-9ax-3by= -14ax+11by-2cz
3)13x+17y-19z+2+14x+12y-31+12-15x+6z+2x+y+11z+9 = 14x+30y-13z-8
please mark my answer as brainliest it's very needed for me
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