1) Find the answer: X + [2−5 73] = [−4−2 4−9]
X = [−4−2 4−9] − [2−5 73] = [−63 −3−12]
2) Find the answer: X − [113 −58] = [1321 −76]
X = [113 −58] + [1321 −76] = [2424 −1214]
3) Find the answer: 2Y + [9−23 −15−7] = [−8−27 133]
2Y = [−8−27 133] − [9−23 −15−7] = [−17−4 2810] ⇒ Y = [−8.5−2 145]
4) Find the answer: 2Y − [−1521 19−17] = [916 −127]
2Y = [−1521 19−17] + [916 −127] = [−637 7−10] ⇒ Y = [−318.5 3.5−5]
5) Find the answer: 2X + [−711 −7−7] = [15−29 17−11]
2X = [15−29 17−11] − [−711 −7−7] = [22−40 24−4] ⇒ X = [11−20 12−2]
6) Find the answer: 2X + [19−208] = [25−31−12]
2X = [25−31−12] − [19−208] = [6−11−20] ⇒ X = [3−5.5−10]
7) Find the answer: X×[2−4 13] = [3−1 2−3]
X×[2−4 13] = [3−1 2−3] ⇒ X = [3−1 2−3]×[2−4 13]−1 = [3−1 2−3]×[31025 −11015]= [1710−32 110−12]
8) Find the answer: X×[51 2−3] = [86 912]
X×[51 2−3] = [86 912] ⇒ X = [86 912]×[51 2−3]−1 = [86 912]×[317117 217−517]= [33173017 −2917−4817]
9) Find the answer: −3X = [−1833−69]
−3X = [−1833−69] ⇒ X = [6−1123]
10) Find the answer: 7 Y = [7042−56]
7 Y = [7042−56] ⇒ Y = [106−8]